Fixed vim and zsh

This commit is contained in:
2018-04-05 13:06:54 +02:00
parent f9db886bd3
commit 0331f6518a
2009 changed files with 256303 additions and 0 deletions

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[run]
omit =
jedi/_compatibility.py
jedi/evaluate/site.py
[report]
# Regexes for lines to exclude from consideration
exclude_lines =
# Don't complain about missing debug-only code:
def __repr__
if self\.debug
# Don't complain if tests don't hit defensive assertion code:
raise AssertionError
raise NotImplementedError
# Don't complain if non-runnable code isn't run:
if 0:
if __name__ == .__main__.:

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*~
*.sw?
*.pyc
.ropeproject
.tox
.coveralls.yml
.coverage
/build/
/docs/_build/
/dist/
jedi.egg-info/
record.json
/.cache/

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language: python
sudo: false
python:
- 2.6
- 2.7
- 3.3
- 3.4
- 3.5
- 3.6
- pypy
matrix:
allow_failures:
- python: pypy
- env: TOXENV=cov
- env: TOXENV=sith
include:
- python: 3.5
env: TOXENV=cov
- python: 3.5
env: TOXENV=sith
install:
- pip install --quiet tox-travis
script:
- tox
after_script:
- if [ $TOXENV == "cov" ]; then
pip install --quiet coveralls;
coveralls;
fi

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Main Authors
============
David Halter (@davidhalter) <davidhalter88@gmail.com>
Takafumi Arakaki (@tkf) <aka.tkf@gmail.com>
Code Contributors
=================
Danilo Bargen (@dbrgn) <mail@dbrgn.ch>
Laurens Van Houtven (@lvh) <_@lvh.cc>
Aldo Stracquadanio (@Astrac) <aldo.strac@gmail.com>
Jean-Louis Fuchs (@ganwell) <ganwell@fangorn.ch>
tek (@tek)
Yasha Borevich (@jjay) <j.borevich@gmail.com>
Aaron Griffin <aaronmgriffin@gmail.com>
andviro (@andviro)
Mike Gilbert (@floppym) <floppym@gentoo.org>
Aaron Meurer (@asmeurer) <asmeurer@gmail.com>
Lubos Trilety <ltrilety@redhat.com>
Akinori Hattori (@hattya) <hattya@gmail.com>
srusskih (@srusskih)
Steven Silvester (@blink1073)
Colin Duquesnoy (@ColinDuquesnoy) <colin.duquesnoy@gmail.com>
Jorgen Schaefer (@jorgenschaefer) <contact@jorgenschaefer.de>
Fredrik Bergroth (@fbergroth)
Mathias Fußenegger (@mfussenegger)
Syohei Yoshida (@syohex) <syohex@gmail.com>
ppalucky (@ppalucky)
immerrr (@immerrr) immerrr@gmail.com
Albertas Agejevas (@alga)
Savor d'Isavano (@KenetJervet) <newelevenken@163.com>
Phillip Berndt (@phillipberndt) <phillip.berndt@gmail.com>
Ian Lee (@IanLee1521) <IanLee1521@gmail.com>
Farkhad Khatamov (@hatamov) <comsgn@gmail.com>
Kevin Kelley (@kelleyk) <kelleyk@kelleyk.net>
Sid Shanker (@squidarth) <sid.p.shanker@gmail.com>
Reinoud Elhorst (@reinhrst)
Guido van Rossum (@gvanrossum) <guido@python.org>
Dmytro Sadovnychyi (@sadovnychyi) <jedi@dmit.ro>
Cristi Burcă (@scribu)
bstaint (@bstaint)
Mathias Rav (@Mortal) <rav@cs.au.dk>
Daniel Fiterman (@dfit99) <fitermandaniel2@gmail.com>
Simon Ruggier (@sruggier)
Élie Gouzien (@ElieGouzien)
Note: (@user) means a github user name.

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.. :changelog:
Changelog
---------
0.11.0 (2017-09-20)
+++++++++++++++++++
- Split Jedi's parser into a separate project called ``parso``.
- Avoiding side effects in REPL completion.
- Numpy docstring support should be much better.
- Moved the `settings.*recursion*` away, they are no longer usable.
0.10.2 (2017-04-05)
+++++++++++++++++++
- Python Packaging sucks. Some files were not included in 0.10.1.
0.10.1 (2017-04-05)
+++++++++++++++++++
- Fixed a few very annoying bugs.
- Prepared the parser to be factored out of Jedi.
0.10.0 (2017-02-03)
+++++++++++++++++++
- Actual semantic completions for the complete Python syntax.
- Basic type inference for ``yield from`` PEP 380.
- PEP 484 support (most of the important features of it). Thanks Claude! (@reinhrst)
- Added ``get_line_code`` to ``Definition`` and ``Completion`` objects.
- Completely rewritten the type inference engine.
- A new and better parser for (fast) parsing diffs of Python code.
0.9.0 (2015-04-10)
++++++++++++++++++
- The import logic has been rewritten to look more like Python's. There is now
an ``Evaluator.modules`` import cache, which resembles ``sys.modules``.
- Integrated the parser of 2to3. This will make refactoring possible. It will
also be possible to check for error messages (like compiling an AST would give)
in the future.
- With the new parser, the evaluation also completely changed. It's now simpler
and more readable.
- Completely rewritten REPL completion.
- Added ``jedi.names``, a command to do static analysis. Thanks to that
sourcegraph guys for sponsoring this!
- Alpha version of the linter.
0.8.1 (2014-07-23)
+++++++++++++++++++
- Bugfix release, the last release forgot to include files that improve
autocompletion for builtin libraries. Fixed.
0.8.0 (2014-05-05)
+++++++++++++++++++
- Memory Consumption for compiled modules (e.g. builtins, sys) has been reduced
drastically. Loading times are down as well (it takes basically as long as an
import).
- REPL completion is starting to become usable.
- Various small API changes. Generally this release focuses on stability and
refactoring of internal APIs.
- Introducing operator precedence, which makes calculating correct Array
indices and ``__getattr__`` strings possible.
0.7.0 (2013-08-09)
++++++++++++++++++
- Switched from LGPL to MIT license.
- Added an Interpreter class to the API to make autocompletion in REPL
possible.
- Added autocompletion support for namespace packages.
- Add sith.py, a new random testing method.
0.6.0 (2013-05-14)
++++++++++++++++++
- Much faster parser with builtin part caching.
- A test suite, thanks @tkf.
0.5 versions (2012)
+++++++++++++++++++
- Initial development.

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Pull Requests are great.
1. Fork the Repo on github.
2. If you are adding functionality or fixing a bug, please add a test!
3. Add your name to AUTHORS.txt
4. Push to your fork and submit a pull request.
**Try to use the PEP8 style guide.**

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All contributions towards Jedi are MIT licensed.
-------------------------------------------------------------------------------
The MIT License (MIT)
Copyright (c) <2013> <David Halter and others, see AUTHORS.txt>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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include README.rst
include CHANGELOG.rst
include LICENSE.txt
include AUTHORS.txt
include .coveragerc
include sith.py
include conftest.py
include pytest.ini
include tox.ini
include requirements.txt
include jedi/evaluate/compiled/fake/*.pym
include jedi/parser/python/grammar*.txt
recursive-include test *
recursive-include docs *
recursive-exclude * *.pyc

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###################################################################
Jedi - an awesome autocompletion/static analysis library for Python
###################################################################
.. image:: https://secure.travis-ci.org/davidhalter/jedi.png?branch=master
:target: http://travis-ci.org/davidhalter/jedi
:alt: Travis-CI build status
.. image:: https://coveralls.io/repos/davidhalter/jedi/badge.png?branch=master
:target: https://coveralls.io/r/davidhalter/jedi
:alt: Coverage Status
*If you have specific questions, please add an issue or ask on* `stackoverflow
<https://stackoverflow.com/questions/tagged/python-jedi>`_ *with the label* ``python-jedi``.
Jedi is a static analysis tool for Python that can be used in IDEs/editors. Its
historic focus is autocompletion, but does static analysis for now as well.
Jedi is fast and is very well tested. It understands Python on a deeper level
than all other static analysis frameworks for Python.
Jedi has support for two different goto functions. It's possible to search for
related names and to list all names in a Python file and infer them. Jedi
understands docstrings and you can use Jedi autocompletion in your REPL as
well.
Jedi uses a very simple API to connect with IDE's. There's a reference
implementation as a `VIM-Plugin <https://github.com/davidhalter/jedi-vim>`_,
which uses Jedi's autocompletion. We encourage you to use Jedi in your IDEs.
It's really easy.
Jedi can currently be used with the following editors/projects:
- Vim (jedi-vim_, YouCompleteMe_, deoplete-jedi_, completor.vim_)
- Emacs (Jedi.el_, company-mode_, elpy_, anaconda-mode_, ycmd_)
- Sublime Text (SublimeJEDI_ [ST2 + ST3], anaconda_ [only ST3])
- TextMate_ (Not sure if it's actually working)
- Kate_ version 4.13+ supports it natively, you have to enable it, though. [`proof
<https://projects.kde.org/projects/kde/applications/kate/repository/show?rev=KDE%2F4.13>`_]
- Atom_ (autocomplete-python-jedi_)
- SourceLair_
- `GNOME Builder`_ (with support for GObject Introspection)
- `Visual Studio Code`_ (via `Python Extension <https://marketplace.visualstudio.com/items?itemName=donjayamanne.python>`_)
- Gedit (gedi_)
- wdb_ - Web Debugger
- `Eric IDE`_ (Available as a plugin)
- `Ipython 6.0.0+ <http://ipython.readthedocs.io/en/stable/whatsnew/version6.html>`_
and many more!
Here are some pictures taken from jedi-vim_:
.. image:: https://github.com/davidhalter/jedi/raw/master/docs/_screenshots/screenshot_complete.png
Completion for almost anything (Ctrl+Space).
.. image:: https://github.com/davidhalter/jedi/raw/master/docs/_screenshots/screenshot_function.png
Display of function/class bodies, docstrings.
.. image:: https://github.com/davidhalter/jedi/raw/master/docs/_screenshots/screenshot_pydoc.png
Pydoc support (Shift+k).
There is also support for goto and renaming.
Get the latest version from `github <https://github.com/davidhalter/jedi>`_
(master branch should always be kind of stable/working).
Docs are available at `https://jedi.readthedocs.org/en/latest/
<https://jedi.readthedocs.org/en/latest/>`_. Pull requests with documentation
enhancements and/or fixes are awesome and most welcome. Jedi uses `semantic
versioning <http://semver.org/>`_.
Installation
============
pip install jedi
Note: This just installs the Jedi library, not the editor plugins. For
information about how to make it work with your editor, refer to the
corresponding documentation.
You don't want to use ``pip``? Please refer to the `manual
<https://jedi.readthedocs.org/en/latest/docs/installation.html>`_.
Feature Support and Caveats
===========================
Jedi really understands your Python code. For a comprehensive list what Jedi
understands, see: `Features
<https://jedi.readthedocs.org/en/latest/docs/features.html>`_. A list of
caveats can be found on the same page.
You can run Jedi on cPython 2.6, 2.7, 3.3, 3.4 or 3.5 but it should also
understand/parse code older than those versions.
Tips on how to use Jedi efficiently can be found `here
<https://jedi.readthedocs.org/en/latest/docs/features.html#recipes>`_.
API
---
You can find the documentation for the `API here <https://jedi.readthedocs.org/en/latest/docs/plugin-api.html>`_.
Autocompletion / Goto / Pydoc
-----------------------------
Please check the API for a good explanation. There are the following commands:
- ``jedi.Script.goto_assignments``
- ``jedi.Script.completions``
- ``jedi.Script.usages``
The returned objects are very powerful and really all you might need.
Autocompletion in your REPL (IPython, etc.)
-------------------------------------------
Starting with Ipython `6.0.0` Jedi is a dependency of IPython. Autocompletion
in IPython is therefore possible without additional configuration.
It's possible to have Jedi autocompletion in REPL modes - `example video <https://vimeo.com/122332037>`_.
This means that in Python you can enable tab completion in a `REPL
<https://jedi.readthedocs.org/en/latest/docs/usage.html#tab-completion-in-the-python-shell>`_.
Static Analysis / Linter
------------------------
To do all forms of static analysis, please try to use ``jedi.names``. It will
return a list of names that you can use to infer types and so on.
Linting is another thing that is going to be part of Jedi. For now you can try
an alpha version ``python -m jedi linter``. The API might change though and
it's still buggy. It's Jedi's goal to be smarter than classic linter and
understand ``AttributeError`` and other code issues.
Refactoring
-----------
Jedi's parser would support refactoring, but there's no API to use it right
now. If you're interested in helping out here, let me know. With the latest
parser changes, it should be very easy to actually make it work.
Development
===========
There's a pretty good and extensive `development documentation
<https://jedi.readthedocs.org/en/latest/docs/development.html>`_.
Testing
=======
The test suite depends on ``tox`` and ``pytest``::
pip install tox pytest
To run the tests for all supported Python versions::
tox
If you want to test only a specific Python version (e.g. Python 2.7), it's as
easy as ::
tox -e py27
Tests are also run automatically on `Travis CI
<https://travis-ci.org/davidhalter/jedi/>`_.
For more detailed information visit the `testing documentation
<https://jedi.readthedocs.org/en/latest/docs/testing.html>`_
Acknowledgements
================
- Takafumi Arakaki (@tkf) for creating a solid test environment and a lot of
other things.
- Danilo Bargen (@dbrgn) for general housekeeping and being a good friend :).
- Guido van Rossum (@gvanrossum) for creating the parser generator pgen2
(originally used in lib2to3).
.. _jedi-vim: https://github.com/davidhalter/jedi-vim
.. _youcompleteme: http://valloric.github.io/YouCompleteMe/
.. _deoplete-jedi: https://github.com/zchee/deoplete-jedi
.. _completor.vim: https://github.com/maralla/completor.vim
.. _Jedi.el: https://github.com/tkf/emacs-jedi
.. _company-mode: https://github.com/syohex/emacs-company-jedi
.. _elpy: https://github.com/jorgenschaefer/elpy
.. _anaconda-mode: https://github.com/proofit404/anaconda-mode
.. _ycmd: https://github.com/abingham/emacs-ycmd
.. _sublimejedi: https://github.com/srusskih/SublimeJEDI
.. _anaconda: https://github.com/DamnWidget/anaconda
.. _wdb: https://github.com/Kozea/wdb
.. _TextMate: https://github.com/lawrenceakka/python-jedi.tmbundle
.. _Kate: http://kate-editor.org
.. _Atom: https://atom.io/
.. _autocomplete-python-jedi: https://atom.io/packages/autocomplete-python-jedi
.. _SourceLair: https://www.sourcelair.com
.. _GNOME Builder: https://wiki.gnome.org/Apps/Builder
.. _Visual Studio Code: https://code.visualstudio.com/
.. _gedi: https://github.com/isamert/gedi
.. _Eric IDE: http://eric-ide.python-projects.org

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import tempfile
import shutil
import pytest
import jedi
collect_ignore = ["setup.py"]
# The following hooks (pytest_configure, pytest_unconfigure) are used
# to modify `jedi.settings.cache_directory` because `clean_jedi_cache`
# has no effect during doctests. Without these hooks, doctests uses
# user's cache (e.g., ~/.cache/jedi/). We should remove this
# workaround once the problem is fixed in py.test.
#
# See:
# - https://github.com/davidhalter/jedi/pull/168
# - https://bitbucket.org/hpk42/pytest/issue/275/
jedi_cache_directory_orig = None
jedi_cache_directory_temp = None
def pytest_addoption(parser):
parser.addoption("--jedi-debug", "-D", action='store_true',
help="Enables Jedi's debug output.")
parser.addoption("--warning-is-error", action='store_true',
help="Warnings are treated as errors.")
def pytest_configure(config):
global jedi_cache_directory_orig, jedi_cache_directory_temp
jedi_cache_directory_orig = jedi.settings.cache_directory
jedi_cache_directory_temp = tempfile.mkdtemp(prefix='jedi-test-')
jedi.settings.cache_directory = jedi_cache_directory_temp
if config.option.jedi_debug:
jedi.set_debug_function()
if config.option.warning_is_error:
import warnings
warnings.simplefilter("error")
def pytest_unconfigure(config):
global jedi_cache_directory_orig, jedi_cache_directory_temp
jedi.settings.cache_directory = jedi_cache_directory_orig
shutil.rmtree(jedi_cache_directory_temp)
@pytest.fixture(scope='session')
def clean_jedi_cache(request):
"""
Set `jedi.settings.cache_directory` to a temporary directory during test.
Note that you can't use built-in `tmpdir` and `monkeypatch`
fixture here because their scope is 'function', which is not used
in 'session' scope fixture.
This fixture is activated in ../pytest.ini.
"""
from jedi import settings
old = settings.cache_directory
tmp = tempfile.mkdtemp(prefix='jedi-test-')
settings.cache_directory = tmp
@request.addfinalizer
def restore():
settings.cache_directory = old
shutil.rmtree(tmp)

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#!/usr/bin/env bash
# The script creates a separate folder in build/ and creates tags there, pushes
# them and then uploads the package to PyPI.
set -eu -o pipefail
BASE_DIR=$(dirname $(readlink -f "$0"))
cd $BASE_DIR
git fetch --tags
PROJECT_NAME=jedi
BRANCH=master
BUILD_FOLDER=build
[ -d $BUILD_FOLDER ] || mkdir $BUILD_FOLDER
# Remove the previous deployment first.
# Checkout the right branch
cd $BUILD_FOLDER
rm -rf $PROJECT_NAME
git clone .. $PROJECT_NAME
cd $PROJECT_NAME
git checkout $BRANCH
# Test first.
tox
# Create tag
tag=v$(python -c "import $PROJECT_NAME; print($PROJECT_NAME.__version__)")
master_ref=$(git show-ref -s heads/$BRANCH)
tag_ref=$(git show-ref -s $tag || true)
if [[ $tag_ref ]]; then
if [[ $tag_ref != $master_ref ]]; then
echo 'Cannot tag something that has already been tagged with another commit.'
exit 1
fi
else
git tag $tag
git push --tags
fi
# Package and upload to PyPI
#rm -rf dist/ - Not needed anymore, because the folder is never reused.
echo `pwd`
python setup.py sdist bdist_wheel
# Maybe do a pip install twine before.
twine upload dist/*
cd $BASE_DIR
# The tags have been pushed to this repo. Push the tags to github, now.
git push --tags

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# Makefile for Sphinx documentation
#
# You can set these variables from the command line.
SPHINXOPTS =
SPHINXBUILD = sphinx-build
PAPER =
BUILDDIR = _build
# Internal variables.
PAPEROPT_a4 = -D latex_paper_size=a4
PAPEROPT_letter = -D latex_paper_size=letter
ALLSPHINXOPTS = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
# the i18n builder cannot share the environment and doctrees with the others
I18NSPHINXOPTS = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
help:
@echo "Please use \`make <target>' where <target> is one of"
@echo " html to make standalone HTML files"
@echo " dirhtml to make HTML files named index.html in directories"
@echo " singlehtml to make a single large HTML file"
@echo " pickle to make pickle files"
@echo " json to make JSON files"
@echo " htmlhelp to make HTML files and a HTML help project"
@echo " qthelp to make HTML files and a qthelp project"
@echo " devhelp to make HTML files and a Devhelp project"
@echo " epub to make an epub"
@echo " latex to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
@echo " latexpdf to make LaTeX files and run them through pdflatex"
@echo " text to make text files"
@echo " man to make manual pages"
@echo " texinfo to make Texinfo files"
@echo " info to make Texinfo files and run them through makeinfo"
@echo " gettext to make PO message catalogs"
@echo " changes to make an overview of all changed/added/deprecated items"
@echo " linkcheck to check all external links for integrity"
@echo " doctest to run all doctests embedded in the documentation (if enabled)"
clean:
-rm -rf $(BUILDDIR)/*
html:
$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
@echo
@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
dirhtml:
$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
@echo
@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
singlehtml:
$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
@echo
@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
pickle:
$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
@echo
@echo "Build finished; now you can process the pickle files."
json:
$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
@echo
@echo "Build finished; now you can process the JSON files."
htmlhelp:
$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
@echo
@echo "Build finished; now you can run HTML Help Workshop with the" \
".hhp project file in $(BUILDDIR)/htmlhelp."
qthelp:
$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
@echo
@echo "Build finished; now you can run "qcollectiongenerator" with the" \
".qhcp project file in $(BUILDDIR)/qthelp, like this:"
@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/Jedi.qhcp"
@echo "To view the help file:"
@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/Jedi.qhc"
devhelp:
$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
@echo
@echo "Build finished."
@echo "To view the help file:"
@echo "# mkdir -p $$HOME/.local/share/devhelp/Jedi"
@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/Jedi"
@echo "# devhelp"
epub:
$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
@echo
@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
latex:
$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
@echo
@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
@echo "Run \`make' in that directory to run these through (pdf)latex" \
"(use \`make latexpdf' here to do that automatically)."
latexpdf:
$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
@echo "Running LaTeX files through pdflatex..."
$(MAKE) -C $(BUILDDIR)/latex all-pdf
@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
text:
$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
@echo
@echo "Build finished. The text files are in $(BUILDDIR)/text."
man:
$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
@echo
@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
texinfo:
$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
@echo
@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
@echo "Run \`make' in that directory to run these through makeinfo" \
"(use \`make info' here to do that automatically)."
info:
$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
@echo "Running Texinfo files through makeinfo..."
make -C $(BUILDDIR)/texinfo info
@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
gettext:
$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
@echo
@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."
changes:
$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
@echo
@echo "The overview file is in $(BUILDDIR)/changes."
linkcheck:
$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
@echo
@echo "Link check complete; look for any errors in the above output " \
"or in $(BUILDDIR)/linkcheck/output.txt."
doctest:
$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
@echo "Testing of doctests in the sources finished, look at the " \
"results in $(BUILDDIR)/doctest/output.txt."

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Installation
------------
Install the graphviz library::
sudo apt-get install graphviz
Install sphinx::
sudo pip install sphinx
You might also need to install the Python graphviz interface::
sudo pip install graphviz

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The source of the logo is a photoshop file hosted here:
https://dl.dropboxusercontent.com/u/170011615/Jedi12_Logo.psd.xz

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<h3>Github</h3>
<iframe src="http://ghbtns.com/github-btn.html?user=davidhalter&repo=jedi&type=watch&count=true&size=large"
frameborder="0" scrolling="0" width="170" height="30" allowtransparency="true"></iframe>
<br><br>

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<p class="logo"><a href="{{ pathto(master_doc) }}">
<img class="logo" src="{{ pathto('_static/logo.png', 1) }}" alt="Logo"/>
</a></p>

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Copyright (c) 2010 by Armin Ronacher.
Some rights reserved.
Redistribution and use in source and binary forms of the theme, with or
without modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* The names of the contributors may not be used to endorse or
promote products derived from this software without specific
prior written permission.
We kindly ask you to only use these themes in an unmodified manner just
for Flask and Flask-related products, not for unrelated projects. If you
like the visual style and want to use it for your own projects, please
consider making some larger changes to the themes (such as changing
font faces, sizes, colors or margins).
THIS THEME IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS THEME, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

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{%- extends "basic/layout.html" %}
{%- block extrahead %}
{{ super() }}
{% if theme_touch_icon %}
<link rel="apple-touch-icon" href="{{ pathto('_static/' ~ theme_touch_icon, 1) }}" />
{% endif %}
<link media="only screen and (max-device-width: 480px)" href="{{
pathto('_static/small_flask.css', 1) }}" type= "text/css" rel="stylesheet" />
<a href="https://github.com/davidhalter/jedi">
<img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_red_aa0000.png" alt="Fork me on GitHub">
</a>
{% endblock %}
{%- block relbar2 %}{% endblock %}
{% block header %}
{{ super() }}
{% if pagename == 'index' %}
<div class=indexwrapper>
{% endif %}
{% endblock %}
{%- block footer %}
<div class="footer">
&copy; Copyright {{ copyright }}.
Created using <a href="http://sphinx.pocoo.org/">Sphinx</a>.
</div>
{% if pagename == 'index' %}
</div>
{% endif %}
{%- endblock %}

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<h3>Related Topics</h3>
<ul>
<li><a href="{{ pathto(master_doc) }}">Documentation overview</a><ul>
{%- for parent in parents %}
<li><a href="{{ parent.link|e }}">{{ parent.title }}</a><ul>
{%- endfor %}
{%- if prev %}
<li>Previous: <a href="{{ prev.link|e }}" title="{{ _('previous chapter')
}}">{{ prev.title }}</a></li>
{%- endif %}
{%- if next %}
<li>Next: <a href="{{ next.link|e }}" title="{{ _('next chapter')
}}">{{ next.title }}</a></li>
{%- endif %}
{%- for parent in parents %}
</ul></li>
{%- endfor %}
</ul></li>
</ul>

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/*
* flasky.css_t
* ~~~~~~~~~~~~
*
* :copyright: Copyright 2010 by Armin Ronacher.
* :license: Flask Design License, see LICENSE for details.
*/
{% set page_width = '940px' %}
{% set sidebar_width = '220px' %}
@import url("basic.css");
/* -- page layout ----------------------------------------------------------- */
body {
font-family: 'Georgia', serif;
font-size: 17px;
background-color: white;
color: #000;
margin: 0;
padding: 0;
}
div.document {
width: {{ page_width }};
margin: 30px auto 0 auto;
}
div.documentwrapper {
float: left;
width: 100%;
}
div.bodywrapper {
margin: 0 0 0 {{ sidebar_width }};
}
div.sphinxsidebar {
width: {{ sidebar_width }};
}
hr {
border: 1px solid #B1B4B6;
}
div.body {
background-color: #ffffff;
color: #3E4349;
padding: 0 30px 0 30px;
}
img.floatingflask {
padding: 0 0 10px 10px;
float: right;
}
div.footer {
width: {{ page_width }};
margin: 20px auto 30px auto;
font-size: 14px;
color: #888;
text-align: right;
}
div.footer a {
color: #888;
}
div.related {
display: none;
}
div.sphinxsidebar a {
color: #444;
text-decoration: none;
border-bottom: 1px dotted #999;
}
div.sphinxsidebar a:hover {
border-bottom: 1px solid #999;
}
div.sphinxsidebar {
font-size: 14px;
line-height: 1.5;
}
div.sphinxsidebarwrapper {
padding: 18px 10px;
}
div.sphinxsidebarwrapper p.logo {
padding: 0 0 20px 0;
margin: 0;
text-align: center;
}
div.sphinxsidebar h3,
div.sphinxsidebar h4 {
font-family: 'Garamond', 'Georgia', serif;
color: #444;
font-size: 24px;
font-weight: normal;
margin: 0 0 5px 0;
padding: 0;
}
div.sphinxsidebar h4 {
font-size: 20px;
}
div.sphinxsidebar h3 a {
color: #444;
}
div.sphinxsidebar p.logo a,
div.sphinxsidebar h3 a,
div.sphinxsidebar p.logo a:hover,
div.sphinxsidebar h3 a:hover {
border: none;
}
div.sphinxsidebar p {
color: #555;
margin: 10px 0;
}
div.sphinxsidebar ul {
margin: 10px 0;
padding: 0;
color: #000;
}
div.sphinxsidebar input {
border: 1px solid #ccc;
font-family: 'Georgia', serif;
font-size: 1em;
}
/* -- body styles ----------------------------------------------------------- */
a {
color: #004B6B;
text-decoration: underline;
}
a:hover {
color: #6D4100;
text-decoration: underline;
}
div.body h1,
div.body h2,
div.body h3,
div.body h4,
div.body h5,
div.body h6 {
font-family: 'Garamond', 'Georgia', serif;
font-weight: normal;
margin: 30px 0px 10px 0px;
padding: 0;
}
{% if theme_index_logo %}
div.indexwrapper h1 {
text-indent: -999999px;
background: url({{ theme_index_logo }}) no-repeat center center;
height: {{ theme_index_logo_height }};
}
{% endif %}
div.body h1 { margin-top: 0; padding-top: 0; font-size: 240%; }
div.body h2 { font-size: 180%; }
div.body h3 { font-size: 150%; }
div.body h4 { font-size: 130%; }
div.body h5 { font-size: 100%; }
div.body h6 { font-size: 100%; }
a.headerlink {
color: #ddd;
padding: 0 4px;
text-decoration: none;
}
a.headerlink:hover {
color: #444;
}
div.body p, div.body dd, div.body li {
line-height: 1.4em;
}
div.admonition {
background: #fafafa;
margin: 20px -30px;
padding: 10px 30px;
border-top: 1px solid #ccc;
border-bottom: 1px solid #ccc;
}
div.admonition tt.xref, div.admonition a tt {
border-bottom: 1px solid #fafafa;
}
dd div.admonition {
margin-left: -60px;
padding-left: 60px;
}
div.admonition p.admonition-title {
font-family: 'Garamond', 'Georgia', serif;
font-weight: normal;
font-size: 24px;
margin: 0 0 10px 0;
padding: 0;
line-height: 1;
}
div.admonition p.last {
margin-bottom: 0;
}
div.highlight {
background-color: white;
}
dt:target, .highlight {
background: #FAF3E8;
}
div.note {
background-color: #eee;
border: 1px solid #ccc;
}
div.seealso {
background-color: #ffc;
border: 1px solid #ff6;
}
div.topic {
background-color: #eee;
}
p.admonition-title {
display: inline;
}
p.admonition-title:after {
content: ":";
}
pre, tt {
font-family: 'Consolas', 'Menlo', 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace;
font-size: 0.9em;
}
img.screenshot {
}
tt.descname, tt.descclassname {
font-size: 0.95em;
}
tt.descname {
padding-right: 0.08em;
}
img.screenshot {
-moz-box-shadow: 2px 2px 4px #eee;
-webkit-box-shadow: 2px 2px 4px #eee;
box-shadow: 2px 2px 4px #eee;
}
table.docutils {
border: 1px solid #888;
-moz-box-shadow: 2px 2px 4px #eee;
-webkit-box-shadow: 2px 2px 4px #eee;
box-shadow: 2px 2px 4px #eee;
}
table.docutils td, table.docutils th {
border: 1px solid #888;
padding: 0.25em 0.7em;
}
table.field-list, table.footnote {
border: none;
-moz-box-shadow: none;
-webkit-box-shadow: none;
box-shadow: none;
}
table.footnote {
margin: 15px 0;
width: 100%;
border: 1px solid #eee;
background: #fdfdfd;
font-size: 0.9em;
}
table.footnote + table.footnote {
margin-top: -15px;
border-top: none;
}
table.field-list th {
padding: 0 0.8em 0 0;
}
table.field-list td {
padding: 0;
}
table.footnote td.label {
width: 0px;
padding: 0.3em 0 0.3em 0.5em;
}
table.footnote td {
padding: 0.3em 0.5em;
}
dl {
margin: 0;
padding: 0;
}
dl dd {
margin-left: 30px;
}
blockquote {
margin: 0 0 0 30px;
padding: 0;
}
ul, ol {
margin: 10px 0 10px 30px;
padding: 0;
}
pre {
background: #eee;
padding: 7px 30px;
margin: 15px -30px;
line-height: 1.3em;
}
dl pre, blockquote pre, li pre {
margin-left: -60px;
padding-left: 60px;
}
dl dl pre {
margin-left: -90px;
padding-left: 90px;
}
tt {
background-color: #ecf0f3;
color: #222;
/* padding: 1px 2px; */
}
tt.xref, a tt {
background-color: #FBFBFB;
border-bottom: 1px solid white;
}
a.reference {
text-decoration: none;
border-bottom: 1px dotted #004B6B;
}
a.reference:hover {
border-bottom: 1px solid #6D4100;
}
a.footnote-reference {
text-decoration: none;
font-size: 0.7em;
vertical-align: top;
border-bottom: 1px dotted #004B6B;
}
a.footnote-reference:hover {
border-bottom: 1px solid #6D4100;
}
a:hover tt {
background: #EEE;
}

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/*
* small_flask.css_t
* ~~~~~~~~~~~~~~~~~
*
* :copyright: Copyright 2010 by Armin Ronacher.
* :license: Flask Design License, see LICENSE for details.
*/
body {
margin: 0;
padding: 20px 30px;
}
div.documentwrapper {
float: none;
background: white;
}
div.sphinxsidebar {
display: block;
float: none;
width: 102.5%;
margin: 50px -30px -20px -30px;
padding: 10px 20px;
background: #333;
color: white;
}
div.sphinxsidebar h3, div.sphinxsidebar h4, div.sphinxsidebar p,
div.sphinxsidebar h3 a {
color: white;
}
div.sphinxsidebar a {
color: #aaa;
}
div.sphinxsidebar p.logo {
display: none;
}
div.document {
width: 100%;
margin: 0;
}
div.related {
display: block;
margin: 0;
padding: 10px 0 20px 0;
}
div.related ul,
div.related ul li {
margin: 0;
padding: 0;
}
div.footer {
display: none;
}
div.bodywrapper {
margin: 0;
}
div.body {
min-height: 0;
padding: 0;
}

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[theme]
inherit = basic
stylesheet = flasky.css
pygments_style = flask_theme_support.FlaskyStyle
[options]
index_logo =
index_logo_height = 120px
touch_icon =

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"""
Copyright (c) 2010 by Armin Ronacher.
Some rights reserved.
Redistribution and use in source and binary forms of the theme, with or
without modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* The names of the contributors may not be used to endorse or
promote products derived from this software without specific
prior written permission.
We kindly ask you to only use these themes in an unmodified manner just
for Flask and Flask-related products, not for unrelated projects. If you
like the visual style and want to use it for your own projects, please
consider making some larger changes to the themes (such as changing
font faces, sizes, colors or margins).
THIS THEME IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS THEME, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
"""
# flasky extensions. flasky pygments style based on tango style
from pygments.style import Style
from pygments.token import Keyword, Name, Comment, String, Error, \
Number, Operator, Generic, Whitespace, Punctuation, Other, Literal
class FlaskyStyle(Style):
background_color = "#f8f8f8"
default_style = ""
styles = {
# No corresponding class for the following:
#Text: "", # class: ''
Whitespace: "underline #f8f8f8", # class: 'w'
Error: "#a40000 border:#ef2929", # class: 'err'
Other: "#000000", # class 'x'
Comment: "italic #8f5902", # class: 'c'
Comment.Preproc: "noitalic", # class: 'cp'
Keyword: "bold #004461", # class: 'k'
Keyword.Constant: "bold #004461", # class: 'kc'
Keyword.Declaration: "bold #004461", # class: 'kd'
Keyword.Namespace: "bold #004461", # class: 'kn'
Keyword.Pseudo: "bold #004461", # class: 'kp'
Keyword.Reserved: "bold #004461", # class: 'kr'
Keyword.Type: "bold #004461", # class: 'kt'
Operator: "#582800", # class: 'o'
Operator.Word: "bold #004461", # class: 'ow' - like keywords
Punctuation: "bold #000000", # class: 'p'
# because special names such as Name.Class, Name.Function, etc.
# are not recognized as such later in the parsing, we choose them
# to look the same as ordinary variables.
Name: "#000000", # class: 'n'
Name.Attribute: "#c4a000", # class: 'na' - to be revised
Name.Builtin: "#004461", # class: 'nb'
Name.Builtin.Pseudo: "#3465a4", # class: 'bp'
Name.Class: "#000000", # class: 'nc' - to be revised
Name.Constant: "#000000", # class: 'no' - to be revised
Name.Decorator: "#888", # class: 'nd' - to be revised
Name.Entity: "#ce5c00", # class: 'ni'
Name.Exception: "bold #cc0000", # class: 'ne'
Name.Function: "#000000", # class: 'nf'
Name.Property: "#000000", # class: 'py'
Name.Label: "#f57900", # class: 'nl'
Name.Namespace: "#000000", # class: 'nn' - to be revised
Name.Other: "#000000", # class: 'nx'
Name.Tag: "bold #004461", # class: 'nt' - like a keyword
Name.Variable: "#000000", # class: 'nv' - to be revised
Name.Variable.Class: "#000000", # class: 'vc' - to be revised
Name.Variable.Global: "#000000", # class: 'vg' - to be revised
Name.Variable.Instance: "#000000", # class: 'vi' - to be revised
Number: "#990000", # class: 'm'
Literal: "#000000", # class: 'l'
Literal.Date: "#000000", # class: 'ld'
String: "#4e9a06", # class: 's'
String.Backtick: "#4e9a06", # class: 'sb'
String.Char: "#4e9a06", # class: 'sc'
String.Doc: "italic #8f5902", # class: 'sd' - like a comment
String.Double: "#4e9a06", # class: 's2'
String.Escape: "#4e9a06", # class: 'se'
String.Heredoc: "#4e9a06", # class: 'sh'
String.Interpol: "#4e9a06", # class: 'si'
String.Other: "#4e9a06", # class: 'sx'
String.Regex: "#4e9a06", # class: 'sr'
String.Single: "#4e9a06", # class: 's1'
String.Symbol: "#4e9a06", # class: 'ss'
Generic: "#000000", # class: 'g'
Generic.Deleted: "#a40000", # class: 'gd'
Generic.Emph: "italic #000000", # class: 'ge'
Generic.Error: "#ef2929", # class: 'gr'
Generic.Heading: "bold #000080", # class: 'gh'
Generic.Inserted: "#00A000", # class: 'gi'
Generic.Output: "#888", # class: 'go'
Generic.Prompt: "#745334", # class: 'gp'
Generic.Strong: "bold #000000", # class: 'gs'
Generic.Subheading: "bold #800080", # class: 'gu'
Generic.Traceback: "bold #a40000", # class: 'gt'
}

View File

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# -*- coding: utf-8 -*-
#
# Jedi documentation build configuration file, created by
# sphinx-quickstart on Wed Dec 26 00:11:34 2012.
#
# This file is execfile()d with the current directory set to its containing dir.
#
# Note that not all possible configuration values are present in this
# autogenerated file.
#
# All configuration values have a default; values that are commented out
# serve to show the default.
import sys
import os
import datetime
# If extensions (or modules to document with autodoc) are in another directory,
# add these directories to sys.path here. If the directory is relative to the
# documentation root, use os.path.abspath to make it absolute, like shown here.
sys.path.insert(0, os.path.abspath('..'))
sys.path.append(os.path.abspath('_themes'))
# -- General configuration -----------------------------------------------------
# If your documentation needs a minimal Sphinx version, state it here.
#needs_sphinx = '1.0'
# Add any Sphinx extension module names here, as strings. They can be extensions
# coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
extensions = ['sphinx.ext.autodoc', 'sphinx.ext.viewcode', 'sphinx.ext.todo',
'sphinx.ext.intersphinx', 'sphinx.ext.inheritance_diagram']
# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']
# The suffix of source filenames.
source_suffix = '.rst'
# The encoding of source files.
source_encoding = 'utf-8'
# The master toctree document.
master_doc = 'index'
# General information about the project.
project = u'Jedi'
copyright = u'2012 - {today.year}, Jedi contributors'.format(today=datetime.date.today())
import jedi
from jedi.utils import version_info
# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
#
# The short X.Y version.
version = '.'.join(str(x) for x in version_info()[:2])
# The full version, including alpha/beta/rc tags.
release = jedi.__version__
# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#language = None
# There are two options for replacing |today|: either, you set today to some
# non-false value, then it is used:
#today = ''
# Else, today_fmt is used as the format for a strftime call.
#today_fmt = '%B %d, %Y'
# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
exclude_patterns = []
# The reST default role (used for this markup: `text`) to use for all documents.
#default_role = None
# If true, '()' will be appended to :func: etc. cross-reference text.
#add_function_parentheses = True
# If true, the current module name will be prepended to all description
# unit titles (such as .. function::).
#add_module_names = True
# If true, sectionauthor and moduleauthor directives will be shown in the
# output. They are ignored by default.
#show_authors = False
# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'
# A list of ignored prefixes for module index sorting.
#modindex_common_prefix = []
# -- Options for HTML output ---------------------------------------------------
# The theme to use for HTML and HTML Help pages. See the documentation for
# a list of builtin themes.
html_theme = 'flask'
# Theme options are theme-specific and customize the look and feel of a theme
# further. For a list of options available for each theme, see the
# documentation.
#html_theme_options = {}
# Add any paths that contain custom themes here, relative to this directory.
html_theme_path = ['_themes']
# The name for this set of Sphinx documents. If None, it defaults to
# "<project> v<release> documentation".
#html_title = None
# A shorter title for the navigation bar. Default is the same as html_title.
#html_short_title = None
# The name of an image file (relative to this directory) to place at the top
# of the sidebar.
#html_logo = None
# The name of an image file (within the static path) to use as favicon of the
# docs. This file should be a Windows icon file (.ico) being 16x16 or 32x32
# pixels large.
#html_favicon = None
# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
html_static_path = ['_static']
# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
# using the given strftime format.
#html_last_updated_fmt = '%b %d, %Y'
# If true, SmartyPants will be used to convert quotes and dashes to
# typographically correct entities.
#html_use_smartypants = True
# Custom sidebar templates, maps document names to template names.
html_sidebars = {
'**': [
'sidebarlogo.html',
'localtoc.html',
#'relations.html',
'ghbuttons.html',
#'sourcelink.html',
#'searchbox.html'
]
}
# Additional templates that should be rendered to pages, maps page names to
# template names.
#html_additional_pages = {}
# If false, no module index is generated.
#html_domain_indices = True
# If false, no index is generated.
#html_use_index = True
# If true, the index is split into individual pages for each letter.
#html_split_index = False
# If true, links to the reST sources are added to the pages.
#html_show_sourcelink = True
# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
#html_show_sphinx = True
# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
#html_show_copyright = True
# If true, an OpenSearch description file will be output, and all pages will
# contain a <link> tag referring to it. The value of this option must be the
# base URL from which the finished HTML is served.
#html_use_opensearch = ''
# This is the file name suffix for HTML files (e.g. ".xhtml").
#html_file_suffix = None
# Output file base name for HTML help builder.
htmlhelp_basename = 'Jedidoc'
#html_style = 'default.css' # Force usage of default template on RTD
# -- Options for LaTeX output --------------------------------------------------
latex_elements = {
# The paper size ('letterpaper' or 'a4paper').
#'papersize': 'letterpaper',
# The font size ('10pt', '11pt' or '12pt').
#'pointsize': '10pt',
# Additional stuff for the LaTeX preamble.
#'preamble': '',
}
# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title, author, documentclass [howto/manual]).
latex_documents = [
('index', 'Jedi.tex', u'Jedi Documentation',
u'Jedi contributors', 'manual'),
]
# The name of an image file (relative to this directory) to place at the top of
# the title page.
#latex_logo = None
# For "manual" documents, if this is true, then toplevel headings are parts,
# not chapters.
#latex_use_parts = False
# If true, show page references after internal links.
#latex_show_pagerefs = False
# If true, show URL addresses after external links.
#latex_show_urls = False
# Documents to append as an appendix to all manuals.
#latex_appendices = []
# If false, no module index is generated.
#latex_domain_indices = True
# -- Options for manual page output --------------------------------------------
# One entry per manual page. List of tuples
# (source start file, name, description, authors, manual section).
man_pages = [
('index', 'jedi', u'Jedi Documentation',
[u'Jedi contributors'], 1)
]
# If true, show URL addresses after external links.
#man_show_urls = False
# -- Options for Texinfo output ------------------------------------------------
# Grouping the document tree into Texinfo files. List of tuples
# (source start file, target name, title, author,
# dir menu entry, description, category)
texinfo_documents = [
('index', 'Jedi', u'Jedi Documentation',
u'Jedi contributors', 'Jedi', 'Awesome Python autocompletion library.',
'Miscellaneous'),
]
# Documents to append as an appendix to all manuals.
#texinfo_appendices = []
# If false, no module index is generated.
#texinfo_domain_indices = True
# How to display URL addresses: 'footnote', 'no', or 'inline'.
#texinfo_show_urls = 'footnote'
# -- Options for todo module ---------------------------------------------------
todo_include_todos = False
# -- Options for autodoc module ------------------------------------------------
autoclass_content = 'both'
autodoc_member_order = 'bysource'
autodoc_default_flags = []
#autodoc_default_flags = ['members', 'undoc-members']
# -- Options for intersphinx module --------------------------------------------
intersphinx_mapping = {
'http://docs.python.org/': None,
}
def skip_deprecated(app, what, name, obj, skip, options):
"""
All attributes containing a deprecated note shouldn't be documented
anymore. This makes it even clearer that they are not supported anymore.
"""
doc = obj.__doc__
return skip or doc and '.. deprecated::' in doc
def setup(app):
app.connect('autodoc-skip-member', skip_deprecated)

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.. include:: ../global.rst
Jedi Development
================
.. currentmodule:: jedi
.. note:: This documentation is for Jedi developers who want to improve Jedi
itself, but have no idea how Jedi works. If you want to use Jedi for
your IDE, look at the `plugin api <plugin-api.html>`_.
Introduction
------------
This page tries to address the fundamental demand for documentation of the
|jedi| internals. Understanding a dynamic language is a complex task. Especially
because type inference in Python can be a very recursive task. Therefore |jedi|
couldn't get rid of complexity. I know that **simple is better than complex**,
but unfortunately it sometimes requires complex solutions to understand complex
systems.
Since most of the Jedi internals have been written by me (David Halter), this
introduction will be written mostly by me, because no one else understands to
the same level how Jedi works. Actually this is also the reason for exactly this
part of the documentation. To make multiple people able to edit the Jedi core.
In five chapters I'm trying to describe the internals of |jedi|:
- :ref:`The Jedi Core <core>`
- :ref:`Core Extensions <core-extensions>`
- :ref:`Imports & Modules <imports-modules>`
- :ref:`Caching & Recursions <caching-recursions>`
- :ref:`Helper modules <dev-helpers>`
.. note:: Testing is not documented here, you'll find that
`right here <testing.html>`_.
.. _core:
The Jedi Core
-------------
The core of Jedi consists of three parts:
- :ref:`Parser <parser>`
- :ref:`Python code evaluation <evaluate>`
- :ref:`API <dev-api>`
Most people are probably interested in :ref:`code evaluation <evaluate>`,
because that's where all the magic happens. I need to introduce the :ref:`parser
<parser>` first, because :mod:`jedi.evaluate` uses it extensively.
.. _parser:
Parser (parser/__init__.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.parser
Parser Tree (parser/tree.py)
++++++++++++++++++++++++++++++++++++++++++++++++
.. automodule:: jedi.parser.tree
Class inheritance diagram:
.. inheritance-diagram::
Module
Class
Function
Lambda
Flow
ForStmt
Import
ExprStmt
Param
Name
CompFor
:parts: 1
.. _evaluate:
Evaluation of python code (evaluate/__init__.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.evaluate
Evaluation Representation (evaluate/representation.py)
++++++++++++++++++++++++++++++++++++++++++++++++++++++
.. automodule:: jedi.evaluate.representation
.. inheritance-diagram::
jedi.evaluate.instance.TreeInstance
jedi.evaluate.representation.ClassContext
jedi.evaluate.representation.FunctionContext
jedi.evaluate.representation.FunctionExecutionContext
:parts: 1
.. _name_resolution:
Name resolution (evaluate/finder.py)
++++++++++++++++++++++++++++++++++++
.. automodule:: jedi.evaluate.finder
.. _dev-api:
API (api.py and api_classes.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The API has been designed to be as easy to use as possible. The API
documentation can be found `here <plugin-api.html>`_. The API itself contains
little code that needs to be mentioned here. Generally I'm trying to be
conservative with the API. I'd rather not add new API features if they are not
necessary, because it's much harder to deprecate stuff than to add it later.
.. _core-extensions:
Core Extensions
---------------
Core Extensions is a summary of the following topics:
- :ref:`Iterables & Dynamic Arrays <iterables>`
- :ref:`Dynamic Parameters <dynamic>`
- :ref:`Diff Parser <diff-parser>`
- :ref:`Docstrings <docstrings>`
- :ref:`Refactoring <refactoring>`
These topics are very important to understand what Jedi additionally does, but
they could be removed from Jedi and Jedi would still work. But slower and
without some features.
.. _iterables:
Iterables & Dynamic Arrays (evaluate/iterable.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To understand Python on a deeper level, |jedi| needs to understand some of the
dynamic features of Python like lists that are filled after creation:
.. automodule:: jedi.evaluate.iterable
.. _dynamic:
Parameter completion (evaluate/dynamic.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.evaluate.dynamic
.. _diff-parser:
Diff Parser (parser/diff.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.parser.python.diff
.. _docstrings:
Docstrings (evaluate/docstrings.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.evaluate.docstrings
.. _refactoring:
Refactoring (evaluate/refactoring.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.refactoring
.. _imports-modules:
Imports & Modules
-------------------
- :ref:`Modules <modules>`
- :ref:`Builtin Modules <builtin>`
- :ref:`Imports <imports>`
.. _builtin:
Compiled Modules (evaluate/compiled.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.evaluate.compiled
.. _imports:
Imports (evaluate/imports.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.evaluate.imports
.. _caching-recursions:
Caching & Recursions
--------------------
- :ref:`Caching <cache>`
- :ref:`Recursions <recursion>`
.. _cache:
Caching (cache.py)
~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.cache
.. _recursion:
Recursions (recursion.py)
~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.evaluate.recursion
.. _dev-helpers:
Helper Modules
---------------
Most other modules are not really central to how Jedi works. They all contain
relevant code, but you if you understand the modules above, you pretty much
understand Jedi.
Python 2/3 compatibility (_compatibility.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi._compatibility

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.. include:: ../global.rst
Features and Caveats
====================
Jedi obviously supports autocompletion. It's also possible to get it working in
(:ref:`your REPL (IPython, etc.) <repl-completion>`).
Static analysis is also possible by using the command ``jedi.names``.
The Jedi Linter is currently in an alpha version and can be tested by calling
``python -m jedi linter``.
Jedi would in theory support refactoring, but we have never publicized it,
because it's not production ready. If you're interested in helping out here,
let me know. With the latest parser changes, it should be very easy to actually
make it work.
General Features
----------------
- python 2.6+ and 3.3+ support
- ignores syntax errors and wrong indentation
- can deal with complex module / function / class structures
- virtualenv support
- can infer function arguments from sphinx, epydoc and basic numpydoc docstrings,
and PEP0484-style type hints (:ref:`type hinting <type-hinting>`)
Supported Python Features
-------------------------
|jedi| supports many of the widely used Python features:
- builtins
- returns, yields, yield from
- tuple assignments / array indexing / dictionary indexing / star unpacking
- with-statement / exception handling
- ``*args`` / ``**kwargs``
- decorators / lambdas / closures
- generators / iterators
- some descriptors: property / staticmethod / classmethod
- some magic methods: ``__call__``, ``__iter__``, ``__next__``, ``__get__``,
``__getitem__``, ``__init__``
- ``list.append()``, ``set.add()``, ``list.extend()``, etc.
- (nested) list comprehensions / ternary expressions
- relative imports
- ``getattr()`` / ``__getattr__`` / ``__getattribute__``
- function annotations (py3k feature, are ignored right now, but being parsed.
I don't know what to do with them.)
- class decorators (py3k feature, are being ignored too, until I find a use
case, that doesn't work with |jedi|)
- simple/usual ``sys.path`` modifications
- ``isinstance`` checks for if/while/assert
- namespace packages (includes ``pkgutil`` and ``pkg_resources`` namespaces)
- Django / Flask / Buildout support
Unsupported Features
--------------------
Not yet implemented:
- manipulations of instances outside the instance variables without using
methods
- implicit namespace packages (Python 3.3+, `PEP 420 <https://www.python.org/dev/peps/pep-0420/>`_)
Will probably never be implemented:
- metaclasses (how could an auto-completion ever support this)
- ``setattr()``, ``__import__()``
- writing to some dicts: ``globals()``, ``locals()``, ``object.__dict__``
- evaluating ``if`` / ``while`` / ``del``
Caveats
-------
**Malformed Syntax**
Syntax errors and other strange stuff may lead to undefined behaviour of the
completion. |jedi| is **NOT** a Python compiler, that tries to correct you. It
is a tool that wants to help you. But **YOU** have to know Python, not |jedi|.
**Legacy Python 2 Features**
This framework should work for both Python 2/3. However, some things were just
not as *pythonic* in Python 2 as things should be. To keep things simple, some
older Python 2 features have been left out:
- Classes: Always Python 3 like, therefore all classes inherit from ``object``.
- Generators: No ``next()`` method. The ``__next__()`` method is used instead.
**Slow Performance**
Importing ``numpy`` can be quite slow sometimes, as well as loading the
builtins the first time. If you want to speed things up, you could write import
hooks in |jedi|, which preload stuff. However, once loaded, this is not a
problem anymore. The same is true for huge modules like ``PySide``, ``wx``,
etc.
**Security**
Security is an important issue for |jedi|. Therefore no Python code is
executed. As long as you write pure python, everything is evaluated
statically. But: If you use builtin modules (``c_builtin``) there is no other
option than to execute those modules. However: Execute isn't that critical (as
e.g. in pythoncomplete, which used to execute *every* import!), because it
means one import and no more. So basically the only dangerous thing is using
the import itself. If your ``c_builtin`` uses some strange initializations, it
might be dangerous. But if it does you're screwed anyways, because eventually
you're going to execute your code, which executes the import.
Recipes
-------
Here are some tips on how to use |jedi| efficiently.
.. _type-hinting:
Type Hinting
~~~~~~~~~~~~
If |jedi| cannot detect the type of a function argument correctly (due to the
dynamic nature of Python), you can help it by hinting the type using
one of the following docstring/annotation syntax styles:
**PEP-0484 style**
https://www.python.org/dev/peps/pep-0484/
function annotations (python 3 only; python 2 function annotations with
comments in planned but not yet implemented)
::
def myfunction(node: ProgramNode, foo: str) -> None:
"""Do something with a ``node``.
"""
node.| # complete here
assignment, for-loop and with-statement type hints (all python versions).
Note that the type hints must be on the same line as the statement
::
x = foo() # type: int
x, y = 2, 3 # type: typing.Optional[int], typing.Union[int, str] # typing module is mostly supported
for key, value in foo.items(): # type: str, Employee # note that Employee must be in scope
pass
with foo() as f: # type: int
print(f + 3)
Most of the features in PEP-0484 are supported including the typing module
(for python < 3.5 you have to do ``pip install typing`` to use these),
and forward references.
Things that are missing (and this is not an exhaustive list; some of these
are planned, others might be hard to implement and provide little worth):
- annotating functions with comments: https://www.python.org/dev/peps/pep-0484/#suggested-syntax-for-python-2-7-and-straddling-code
- understanding ``typing.cast()``
- stub files: https://www.python.org/dev/peps/pep-0484/#stub-files
- ``typing.Callable``
- ``typing.TypeVar``
- User defined generic types: https://www.python.org/dev/peps/pep-0484/#user-defined-generic-types
**Sphinx style**
http://sphinx-doc.org/domains.html#info-field-lists
::
def myfunction(node, foo):
"""Do something with a ``node``.
:type node: ProgramNode
:param str foo: foo parameter description
"""
node.| # complete here
**Epydoc**
http://epydoc.sourceforge.net/manual-fields.html
::
def myfunction(node):
"""Do something with a ``node``.
@type node: ProgramNode
"""
node.| # complete here
**Numpydoc**
https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt
In order to support the numpydoc format, you need to install the `numpydoc
<https://pypi.python.org/pypi/numpydoc>`__ package.
::
def foo(var1, var2, long_var_name='hi'):
r"""A one-line summary that does not use variable names or the
function name.
...
Parameters
----------
var1 : array_like
Array_like means all those objects -- lists, nested lists,
etc. -- that can be converted to an array. We can also
refer to variables like `var1`.
var2 : int
The type above can either refer to an actual Python type
(e.g. ``int``), or describe the type of the variable in more
detail, e.g. ``(N,) ndarray`` or ``array_like``.
long_variable_name : {'hi', 'ho'}, optional
Choices in brackets, default first when optional.
...
"""
var2.| # complete here
A little history
----------------
The Star Wars Jedi are awesome. My Jedi software tries to imitate a little bit
of the precognition the Jedi have. There's even an awesome `scene
<http://www.youtube.com/watch?v=5BDO3pyavOY>`_ of Monty Python Jedis :-).
But actually the name hasn't so much to do with Star Wars. It's part of my
second name.
After I explained Guido van Rossum, how some parts of my auto-completion work,
he said (we drank a beer or two):
*"Oh, that worries me..."*
When it's finished, I hope he'll like it :-)
I actually started Jedi, because there were no good solutions available for VIM.
Most auto-completions just didn't work well. The only good solution was PyCharm.
But I like my good old VIM. Rope was never really intended to be an
auto-completion (and also I really hate project folders for my Python scripts).
It's more of a refactoring suite. So I decided to do my own version of a
completion, which would execute non-dangerous code. But I soon realized, that
this wouldn't work. So I built an extremely recursive thing which understands
many of Python's key features.
By the way, I really tried to program it as understandable as possible. But I
think understanding it might need quite some time, because of its recursive
nature.

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.. include:: ../global.rst
Installation and Configuration
==============================
You can either include |jedi| as a submodule in your text editor plugin (like
jedi-vim_ does by default), or you can install it systemwide.
.. note:: This just installs the |jedi| library, not the :ref:`editor plugins
<editor-plugins>`. For information about how to make it work with your
editor, refer to the corresponding documentation.
The preferred way
-----------------
On any system you can install |jedi| directly from the Python package index
using pip::
sudo pip install jedi
If you want to install the current development version (master branch)::
sudo pip install -e git://github.com/davidhalter/jedi.git#egg=jedi
System-wide installation via a package manager
----------------------------------------------
Arch Linux
~~~~~~~~~~
You can install |jedi| directly from official Arch Linux packages:
- `python-jedi <https://www.archlinux.org/packages/community/any/python-jedi/>`__
(Python 3)
- `python2-jedi <https://www.archlinux.org/packages/community/any/python2-jedi/>`__
(Python 2)
The specified Python version just refers to the *runtime environment* for
|jedi|. Use the Python 2 version if you're running vim (or whatever editor you
use) under Python 2. Otherwise, use the Python 3 version. But whatever version
you choose, both are able to complete both Python 2 and 3 *code*.
(There is also a packaged version of the vim plugin available:
`vim-jedi at Arch Linux <https://www.archlinux.org/packages/community/any/vim-jedi/>`__.)
Debian
~~~~~~
Debian packages are available in the `unstable repository
<http://packages.debian.org/search?keywords=python%20jedi>`__.
Others
~~~~~~
We are in the discussion of adding |jedi| to the Fedora repositories.
Manual installation from a downloaded package
---------------------------------------------
If you prefer not to use an automated package installer, you can `download
<https://github.com/davidhalter/jedi/archive/master.zip>`__ a current copy of
|jedi| and install it manually.
To install it, navigate to the directory containing `setup.py` on your console
and type::
sudo python setup.py install
Inclusion as a submodule
------------------------
If you use an editor plugin like jedi-vim_, you can simply include |jedi| as a
git submodule of the plugin directory. Vim plugin managers like Vundle_ or
Pathogen_ make it very easy to keep submodules up to date.
.. _jedi-vim: https://github.com/davidhalter/jedi-vim
.. _vundle: https://github.com/gmarik/vundle
.. _pathogen: https://github.com/tpope/vim-pathogen

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.. _xxx:
Parser Tree
===========
Usage
-----
.. automodule:: jedi.parser.python
:members:
:undoc-members:
Parser Tree Base Class
----------------------
All nodes and leaves have these methods/properties:
.. autoclass:: jedi.parser.tree.NodeOrLeaf
:members:
:undoc-members:
Python Parser Tree
------------------
.. automodule:: jedi.parser.python.tree
:members:
:undoc-members:
:show-inheritance:
Utility
-------
.. autofunction:: jedi.parser.tree.search_ancestor

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.. include:: ../global.rst
.. _plugin-api-classes:
API Return Classes
------------------
.. automodule:: jedi.api.classes
:members:
:undoc-members:

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.. include:: ../global.rst
The Plugin API
==============
.. currentmodule:: jedi
Note: This documentation is for Plugin developers, who want to improve their
editors/IDE autocompletion
If you want to use |jedi|, you first need to ``import jedi``. You then have
direct access to the :class:`.Script`. You can then call the functions
documented here. These functions return :ref:`API classes
<plugin-api-classes>`.
Deprecations
------------
The deprecation process is as follows:
1. A deprecation is announced in the next major/minor release.
2. We wait either at least a year & at least two minor releases until we remove
the deprecated functionality.
API documentation
-----------------
API Interface
~~~~~~~~~~~~~
.. automodule:: jedi.api
:members:
:undoc-members:
Examples
--------
Completions:
.. sourcecode:: python
>>> import jedi
>>> source = '''import json; json.l'''
>>> script = jedi.Script(source, 1, 19, '')
>>> script
<jedi.api.Script object at 0x2121b10>
>>> completions = script.completions()
>>> completions
[<Completion: load>, <Completion: loads>]
>>> completions[1]
<Completion: loads>
>>> completions[1].complete
'oads'
>>> completions[1].name
'loads'
Definitions / Goto:
.. sourcecode:: python
>>> import jedi
>>> source = '''def my_func():
... print 'called'
...
... alias = my_func
... my_list = [1, None, alias]
... inception = my_list[2]
...
... inception()'''
>>> script = jedi.Script(source, 8, 1, '')
>>>
>>> script.goto_assignments()
[<Definition inception=my_list[2]>]
>>>
>>> script.goto_definitions()
[<Definition def my_func>]
Related names:
.. sourcecode:: python
>>> import jedi
>>> source = '''x = 3
... if 1 == 2:
... x = 4
... else:
... del x'''
>>> script = jedi.Script(source, 5, 8, '')
>>> rns = script.related_names()
>>> rns
[<RelatedName x@3,4>, <RelatedName x@1,0>]
>>> rns[0].start_pos
(3, 4)
>>> rns[0].is_keyword
False
>>> rns[0].text
'x'

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.. include:: ../global.rst
Settings
========
.. automodule:: jedi.settings

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This file is the start of the documentation of how static analysis works.
Below is a list of parser names that are used within nodes_to_execute.
------------ cared for:
global_stmt
exec_stmt # no priority
assert_stmt
if_stmt
while_stmt
for_stmt
try_stmt
(except_clause)
with_stmt
(with_item)
(with_var)
print_stmt
del_stmt
return_stmt
raise_stmt
yield_expr
file_input
funcdef
param
old_lambdef
lambdef
import_name
import_from
(import_as_name)
(dotted_as_name)
(import_as_names)
(dotted_as_names)
(dotted_name)
classdef
comp_for
(comp_if) ?
decorator
----------- add basic
test
or_test
and_test
not_test
expr
xor_expr
and_expr
shift_expr
arith_expr
term
factor
power
atom
comparison
expr_stmt
testlist
testlist1
testlist_safe
----------- special care:
# mostly depends on how we handle the other ones.
testlist_star_expr # should probably just work with expr_stmt
star_expr
exprlist # just ignore? then names are just resolved. Strange anyway, bc expr is not really allowed in the list, typically.
----------- ignore:
suite
subscriptlist
subscript
simple_stmt
?? sliceop # can probably just be added.
testlist_comp # prob ignore and care about it with atom.
dictorsetmaker
trailer
decorators
decorated
# always execute function arguments? -> no problem with stars.
# Also arglist and argument are different in different grammars.
arglist
argument
----------- remove:
tname # only exists in current Jedi parser. REMOVE!
tfpdef # python 2: tuple assignment; python 3: annotation
vfpdef # reduced in python 3 and therefore not existing.
tfplist # not in 3
vfplist # not in 3
--------- not existing with parser reductions.
small_stmt
import_stmt
flow_stmt
compound_stmt
stmt
pass_stmt
break_stmt
continue_stmt
comp_op
augassign
old_test
typedargslist # afaik becomes [param]
varargslist # dito
vname
comp_iter
test_nocond

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.. include:: ../global.rst
Jedi Testing
============
The test suite depends on ``tox`` and ``pytest``::
pip install tox pytest
To run the tests for all supported Python versions::
tox
If you want to test only a specific Python version (e.g. Python 2.7), it's as
easy as::
tox -e py27
Tests are also run automatically on `Travis CI
<https://travis-ci.org/davidhalter/jedi/>`_.
You want to add a test for |jedi|? Great! We love that. Normally you should
write your tests as :ref:`Blackbox Tests <blackbox>`. Most tests would
fit right in there.
For specific API testing we're using simple unit tests, with a focus on a
simple and readable testing structure.
.. _blackbox:
Blackbox Tests (run.py)
~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: test.run
Refactoring Tests (refactor.py)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: test.refactor

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.. include:: ../global.rst
End User Usage
==============
If you are a not an IDE Developer, the odds are that you just want to use
|jedi| as a browser plugin or in the shell. Yes that's :ref:`also possible
<repl-completion>`!
|jedi| is relatively young and can be used in a variety of Plugins and
Software. If your Editor/IDE is not among them, recommend |jedi| to your IDE
developers.
.. _editor-plugins:
Editor Plugins
--------------
Vim:
- jedi-vim_
- YouCompleteMe_
- deoplete-jedi_
Emacs:
- Jedi.el_
- elpy_
- anaconda-mode_
Sublime Text 2/3:
- SublimeJEDI_ (ST2 & ST3)
- anaconda_ (only ST3)
SynWrite:
- SynJedi_
TextMate:
- Textmate_ (Not sure if it's actually working)
Kate:
- Kate_ version 4.13+ `supports it natively
<https://projects.kde.org/projects/kde/applications/kate/repository/entry/addons/kate/pate/src/plugins/python_autocomplete_jedi.py?rev=KDE%2F4.13>`__,
you have to enable it, though.
Visual Studio Code:
- `Python Extension`_
Atom:
- autocomplete-python-jedi_
SourceLair:
- SourceLair_
GNOME Builder:
- `GNOME Builder`_ `supports it natively
<https://git.gnome.org/browse/gnome-builder/tree/plugins/jedi>`__,
and is enabled by default.
Gedit:
- gedi_
Eric IDE:
- `Eric IDE`_ (Available as a plugin)
Web Debugger:
- wdb_
and many more!
.. _repl-completion:
Tab Completion in the Python Shell
----------------------------------
Starting with Ipython `6.0.0` Jedi is a dependency of IPython. Autocompletion
in IPython is therefore possible without additional configuration.
There are two different options how you can use Jedi autocompletion in
your Python interpreter. One with your custom ``$HOME/.pythonrc.py`` file
and one that uses ``PYTHONSTARTUP``.
Using ``PYTHONSTARTUP``
~~~~~~~~~~~~~~~~~~~~~~~
.. automodule:: jedi.api.replstartup
Using a custom ``$HOME/.pythonrc.py``
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. autofunction:: jedi.utils.setup_readline
.. _jedi-vim: https://github.com/davidhalter/jedi-vim
.. _youcompleteme: http://valloric.github.io/YouCompleteMe/
.. _deoplete-jedi: https://github.com/zchee/deoplete-jedi
.. _Jedi.el: https://github.com/tkf/emacs-jedi
.. _elpy: https://github.com/jorgenschaefer/elpy
.. _anaconda-mode: https://github.com/proofit404/anaconda-mode
.. _sublimejedi: https://github.com/srusskih/SublimeJEDI
.. _anaconda: https://github.com/DamnWidget/anaconda
.. _SynJedi: http://uvviewsoft.com/synjedi/
.. _wdb: https://github.com/Kozea/wdb
.. _TextMate: https://github.com/lawrenceakka/python-jedi.tmbundle
.. _kate: http://kate-editor.org/
.. _autocomplete-python-jedi: https://atom.io/packages/autocomplete-python-jedi
.. _SourceLair: https://www.sourcelair.com
.. _GNOME Builder: https://wiki.gnome.org/Apps/Builder/
.. _gedi: https://github.com/isamert/gedi
.. _Eric IDE: http://eric-ide.python-projects.org
.. _Python Extension: https://marketplace.visualstudio.com/items?itemName=donjayamanne.python

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:orphan:
.. |jedi| replace:: *Jedi*

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.. include global.rst
Jedi - an awesome autocompletion/static analysis library for Python
===================================================================
Release v\ |release|. (:doc:`Installation <docs/installation>`)
.. automodule:: jedi
Autocompletion can look like this (e.g. VIM plugin):
.. figure:: _screenshots/screenshot_complete.png
.. _toc:
Docs
----
.. toctree::
:maxdepth: 2
docs/usage
docs/installation
docs/features
docs/plugin-api
docs/plugin-api-classes
docs/settings
docs/development
docs/testing
.. _resources:
Resources
---------
- `Source Code on Github <https://github.com/davidhalter/jedi>`_
- `Travis Testing <https://travis-ci.org/davidhalter/jedi>`_
- `Python Package Index <http://pypi.python.org/pypi/jedi/>`_

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"""
Jedi is a static analysis tool for Python that can be used in IDEs/editors. Its
historic focus is autocompletion, but does static analysis for now as well.
Jedi is fast and is very well tested. It understands Python on a deeper level
than all other static analysis frameworks for Python.
Jedi has support for two different goto functions. It's possible to search for
related names and to list all names in a Python file and infer them. Jedi
understands docstrings and you can use Jedi autocompletion in your REPL as
well.
Jedi uses a very simple API to connect with IDE's. There's a reference
implementation as a `VIM-Plugin <https://github.com/davidhalter/jedi-vim>`_,
which uses Jedi's autocompletion. We encourage you to use Jedi in your IDEs.
It's really easy.
To give you a simple example how you can use the Jedi library, here is an
example for the autocompletion feature:
>>> import jedi
>>> source = '''
... import datetime
... datetime.da'''
>>> script = jedi.Script(source, 3, len('datetime.da'), 'example.py')
>>> script
<Script: 'example.py'>
>>> completions = script.completions()
>>> completions #doctest: +ELLIPSIS
[<Completion: date>, <Completion: datetime>, ...]
>>> print(completions[0].complete)
te
>>> print(completions[0].name)
date
As you see Jedi is pretty simple and allows you to concentrate on writing a
good text editor, while still having very good IDE features for Python.
"""
__version__ = '0.11.0'
from jedi.api import Script, Interpreter, set_debug_function, \
preload_module, names
from jedi import settings

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import sys
from os.path import join, dirname, abspath, isdir
def _start_linter():
"""
This is a pre-alpha API. You're not supposed to use it at all, except for
testing. It will very likely change.
"""
import jedi
if '--debug' in sys.argv:
jedi.set_debug_function()
for path in sys.argv[2:]:
if path.startswith('--'):
continue
if isdir(path):
import fnmatch
import os
paths = []
for root, dirnames, filenames in os.walk(path):
for filename in fnmatch.filter(filenames, '*.py'):
paths.append(os.path.join(root, filename))
else:
paths = [path]
try:
for path in paths:
for error in jedi.Script(path=path)._analysis():
print(error)
except Exception:
if '--pdb' in sys.argv:
import traceback
traceback.print_exc()
import pdb
pdb.post_mortem()
else:
raise
if len(sys.argv) == 2 and sys.argv[1] == 'repl':
# don't want to use __main__ only for repl yet, maybe we want to use it for
# something else. So just use the keyword ``repl`` for now.
print(join(dirname(abspath(__file__)), 'api', 'replstartup.py'))
elif len(sys.argv) > 1 and sys.argv[1] == 'linter':
_start_linter()

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"""
To ensure compatibility from Python ``2.6`` - ``3.3``, a module has been
created. Clearly there is huge need to use conforming syntax.
"""
import sys
import imp
import os
import re
import pkgutil
import warnings
try:
import importlib
except ImportError:
pass
# Cannot use sys.version.major and minor names, because in Python 2.6 it's not
# a namedtuple.
is_py3 = sys.version_info[0] >= 3
is_py33 = is_py3 and sys.version_info[1] >= 3
is_py34 = is_py3 and sys.version_info[1] >= 4
is_py35 = is_py3 and sys.version_info[1] >= 5
is_py26 = not is_py3 and sys.version_info[1] < 7
py_version = int(str(sys.version_info[0]) + str(sys.version_info[1]))
class DummyFile(object):
def __init__(self, loader, string):
self.loader = loader
self.string = string
def read(self):
return self.loader.get_source(self.string)
def close(self):
del self.loader
def find_module_py34(string, path=None, fullname=None):
implicit_namespace_pkg = False
spec = None
loader = None
spec = importlib.machinery.PathFinder.find_spec(string, path)
if hasattr(spec, 'origin'):
origin = spec.origin
implicit_namespace_pkg = origin == 'namespace'
# We try to disambiguate implicit namespace pkgs with non implicit namespace pkgs
if implicit_namespace_pkg:
fullname = string if not path else fullname
implicit_ns_info = ImplicitNSInfo(fullname, spec.submodule_search_locations._path)
return None, implicit_ns_info, False
# we have found the tail end of the dotted path
if hasattr(spec, 'loader'):
loader = spec.loader
return find_module_py33(string, path, loader)
def find_module_py33(string, path=None, loader=None, fullname=None):
loader = loader or importlib.machinery.PathFinder.find_module(string, path)
if loader is None and path is None: # Fallback to find builtins
try:
with warnings.catch_warnings(record=True):
# Mute "DeprecationWarning: Use importlib.util.find_spec()
# instead." While we should replace that in the future, it's
# probably good to wait until we deprecate Python 3.3, since
# it was added in Python 3.4 and find_loader hasn't been
# removed in 3.6.
loader = importlib.find_loader(string)
except ValueError as e:
# See #491. Importlib might raise a ValueError, to avoid this, we
# just raise an ImportError to fix the issue.
raise ImportError("Originally " + repr(e))
if loader is None:
raise ImportError("Couldn't find a loader for {0}".format(string))
try:
is_package = loader.is_package(string)
if is_package:
if hasattr(loader, 'path'):
module_path = os.path.dirname(loader.path)
else:
# At least zipimporter does not have path attribute
module_path = os.path.dirname(loader.get_filename(string))
if hasattr(loader, 'archive'):
module_file = DummyFile(loader, string)
else:
module_file = None
else:
module_path = loader.get_filename(string)
module_file = DummyFile(loader, string)
except AttributeError:
# ExtensionLoader has not attribute get_filename, instead it has a
# path attribute that we can use to retrieve the module path
try:
module_path = loader.path
module_file = DummyFile(loader, string)
except AttributeError:
module_path = string
module_file = None
finally:
is_package = False
if hasattr(loader, 'archive'):
module_path = loader.archive
return module_file, module_path, is_package
def find_module_pre_py33(string, path=None, fullname=None):
try:
module_file, module_path, description = imp.find_module(string, path)
module_type = description[2]
return module_file, module_path, module_type is imp.PKG_DIRECTORY
except ImportError:
pass
if path is None:
path = sys.path
for item in path:
loader = pkgutil.get_importer(item)
if loader:
try:
loader = loader.find_module(string)
if loader:
is_package = loader.is_package(string)
is_archive = hasattr(loader, 'archive')
try:
module_path = loader.get_filename(string)
except AttributeError:
# fallback for py26
try:
module_path = loader._get_filename(string)
except AttributeError:
continue
if is_package:
module_path = os.path.dirname(module_path)
if is_archive:
module_path = loader.archive
file = None
if not is_package or is_archive:
file = DummyFile(loader, string)
return (file, module_path, is_package)
except ImportError:
pass
raise ImportError("No module named {0}".format(string))
find_module = find_module_py33 if is_py33 else find_module_pre_py33
find_module = find_module_py34 if is_py34 else find_module
find_module.__doc__ = """
Provides information about a module.
This function isolates the differences in importing libraries introduced with
python 3.3 on; it gets a module name and optionally a path. It will return a
tuple containin an open file for the module (if not builtin), the filename
or the name of the module if it is a builtin one and a boolean indicating
if the module is contained in a package.
"""
class ImplicitNSInfo(object):
"""Stores information returned from an implicit namespace spec"""
def __init__(self, name, paths):
self.name = name
self.paths = paths
# unicode function
try:
unicode = unicode
except NameError:
unicode = str
# exec function
if is_py3:
def exec_function(source, global_map):
exec(source, global_map)
else:
eval(compile("""def exec_function(source, global_map):
exec source in global_map """, 'blub', 'exec'))
# re-raise function
if is_py3:
def reraise(exception, traceback):
raise exception.with_traceback(traceback)
else:
eval(compile("""
def reraise(exception, traceback):
raise exception, None, traceback
""", 'blub', 'exec'))
reraise.__doc__ = """
Re-raise `exception` with a `traceback` object.
Usage::
reraise(Exception, sys.exc_info()[2])
"""
class Python3Method(object):
def __init__(self, func):
self.func = func
def __get__(self, obj, objtype):
if obj is None:
return lambda *args, **kwargs: self.func(*args, **kwargs)
else:
return lambda *args, **kwargs: self.func(obj, *args, **kwargs)
def use_metaclass(meta, *bases):
""" Create a class with a metaclass. """
if not bases:
bases = (object,)
return meta("HackClass", bases, {})
try:
encoding = sys.stdout.encoding
if encoding is None:
encoding = 'utf-8'
except AttributeError:
encoding = 'ascii'
def u(string):
"""Cast to unicode DAMMIT!
Written because Python2 repr always implicitly casts to a string, so we
have to cast back to a unicode (and we now that we always deal with valid
unicode, because we check that in the beginning).
"""
if is_py3:
return str(string)
if not isinstance(string, unicode):
return unicode(str(string), 'UTF-8')
return string
try:
import builtins # module name in python 3
except ImportError:
import __builtin__ as builtins
import ast
def literal_eval(string):
# py3.0, py3.1 and py32 don't support unicode literals. Support those, I
# don't want to write two versions of the tokenizer.
if is_py3 and sys.version_info.minor < 3:
if re.match('[uU][\'"]', string):
string = string[1:]
return ast.literal_eval(string)
try:
from itertools import zip_longest
except ImportError:
from itertools import izip_longest as zip_longest # Python 2
try:
FileNotFoundError = FileNotFoundError
except NameError:
FileNotFoundError = IOError
def no_unicode_pprint(dct):
"""
Python 2/3 dict __repr__ may be different, because of unicode differens
(with or without a `u` prefix). Normally in doctests we could use `pprint`
to sort dicts and check for equality, but here we have to write a separate
function to do that.
"""
import pprint
s = pprint.pformat(dct)
print(re.sub("u'", "'", s))
def utf8_repr(func):
"""
``__repr__`` methods in Python 2 don't allow unicode objects to be
returned. Therefore cast them to utf-8 bytes in this decorator.
"""
def wrapper(self):
result = func(self)
if isinstance(result, unicode):
return result.encode('utf-8')
else:
return result
if is_py3:
return func
else:
return wrapper

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"""
The API basically only provides one class. You can create a :class:`Script` and
use its methods.
Additionally you can add a debug function with :func:`set_debug_function`.
Alternatively, if you don't need a custom function and are happy with printing
debug messages to stdout, simply call :func:`set_debug_function` without
arguments.
.. warning:: Please, note that Jedi is **not thread safe**.
"""
import os
import sys
import parso
from parso.python import tree
from parso import python_bytes_to_unicode, split_lines
from jedi.parser_utils import get_executable_nodes, get_statement_of_position
from jedi import debug
from jedi import settings
from jedi import cache
from jedi.api import classes
from jedi.api import interpreter
from jedi.api import usages
from jedi.api import helpers
from jedi.api.completion import Completion
from jedi.evaluate import Evaluator
from jedi.evaluate import representation as er
from jedi.evaluate import imports
from jedi.evaluate.param import try_iter_content
from jedi.evaluate.helpers import get_module_names, evaluate_call_of_leaf
from jedi.evaluate.sys_path import get_venv_path, dotted_path_in_sys_path
from jedi.evaluate.iterable import unpack_tuple_to_dict
from jedi.evaluate.filters import TreeNameDefinition
# Jedi uses lots and lots of recursion. By setting this a little bit higher, we
# can remove some "maximum recursion depth" errors.
sys.setrecursionlimit(3000)
class Script(object):
"""
A Script is the base for completions, goto or whatever you want to do with
|jedi|.
You can either use the ``source`` parameter or ``path`` to read a file.
Usually you're going to want to use both of them (in an editor).
The script might be analyzed in a different ``sys.path`` than |jedi|:
- if `sys_path` parameter is not ``None``, it will be used as ``sys.path``
for the script;
- if `sys_path` parameter is ``None`` and ``VIRTUAL_ENV`` environment
variable is defined, ``sys.path`` for the specified environment will be
guessed (see :func:`jedi.evaluate.sys_path.get_venv_path`) and used for
the script;
- otherwise ``sys.path`` will match that of |jedi|.
:param source: The source code of the current file, separated by newlines.
:type source: str
:param line: The line to perform actions on (starting with 1).
:type line: int
:param column: The column of the cursor (starting with 0).
:type column: int
:param path: The path of the file in the file system, or ``''`` if
it hasn't been saved yet.
:type path: str or None
:param encoding: The encoding of ``source``, if it is not a
``unicode`` object (default ``'utf-8'``).
:type encoding: str
:param source_encoding: The encoding of ``source``, if it is not a
``unicode`` object (default ``'utf-8'``).
:type encoding: str
:param sys_path: ``sys.path`` to use during analysis of the script
:type sys_path: list
"""
def __init__(self, source=None, line=None, column=None, path=None,
encoding='utf-8', sys_path=None):
self._orig_path = path
# An empty path (also empty string) should always result in no path.
self.path = os.path.abspath(path) if path else None
if source is None:
# TODO add a better warning than the traceback!
with open(path, 'rb') as f:
source = f.read()
# TODO do we really want that?
self._source = python_bytes_to_unicode(source, encoding, errors='replace')
self._code_lines = split_lines(self._source)
line = max(len(self._code_lines), 1) if line is None else line
if not (0 < line <= len(self._code_lines)):
raise ValueError('`line` parameter is not in a valid range.')
line_len = len(self._code_lines[line - 1])
column = line_len if column is None else column
if not (0 <= column <= line_len):
raise ValueError('`column` parameter is not in a valid range.')
self._pos = line, column
self._path = path
cache.clear_time_caches()
debug.reset_time()
# Load the Python grammar of the current interpreter.
self._grammar = parso.load_grammar()
if sys_path is None:
venv = os.getenv('VIRTUAL_ENV')
if venv:
sys_path = list(get_venv_path(venv))
self._evaluator = Evaluator(self._grammar, sys_path=sys_path)
debug.speed('init')
@cache.memoize_method
def _get_module_node(self):
return self._grammar.parse(
code=self._source,
path=self.path,
cache=False, # No disk cache, because the current script often changes.
diff_cache=True,
cache_path=settings.cache_directory
)
@cache.memoize_method
def _get_module(self):
module = er.ModuleContext(
self._evaluator,
self._get_module_node(),
self.path
)
if self.path is not None:
name = dotted_path_in_sys_path(self._evaluator.sys_path, self.path)
if name is not None:
imports.add_module(self._evaluator, name, module)
return module
def __repr__(self):
return '<%s: %s>' % (self.__class__.__name__, repr(self._orig_path))
def completions(self):
"""
Return :class:`classes.Completion` objects. Those objects contain
information about the completions, more than just names.
:return: Completion objects, sorted by name and __ comes last.
:rtype: list of :class:`classes.Completion`
"""
debug.speed('completions start')
completion = Completion(
self._evaluator, self._get_module(), self._code_lines,
self._pos, self.call_signatures
)
completions = completion.completions()
debug.speed('completions end')
return completions
def goto_definitions(self):
"""
Return the definitions of a the path under the cursor. goto function!
This follows complicated paths and returns the end, not the first
definition. The big difference between :meth:`goto_assignments` and
:meth:`goto_definitions` is that :meth:`goto_assignments` doesn't
follow imports and statements. Multiple objects may be returned,
because Python itself is a dynamic language, which means depending on
an option you can have two different versions of a function.
:rtype: list of :class:`classes.Definition`
"""
module_node = self._get_module_node()
leaf = module_node.get_name_of_position(self._pos)
if leaf is None:
leaf = module_node.get_leaf_for_position(self._pos)
if leaf is None:
return []
context = self._evaluator.create_context(self._get_module(), leaf)
definitions = helpers.evaluate_goto_definition(self._evaluator, context, leaf)
names = [s.name for s in definitions]
defs = [classes.Definition(self._evaluator, name) for name in names]
# The additional set here allows the definitions to become unique in an
# API sense. In the internals we want to separate more things than in
# the API.
return helpers.sorted_definitions(set(defs))
def goto_assignments(self, follow_imports=False):
"""
Return the first definition found, while optionally following imports.
Multiple objects may be returned, because Python itself is a
dynamic language, which means depending on an option you can have two
different versions of a function.
:rtype: list of :class:`classes.Definition`
"""
def filter_follow_imports(names, check):
for name in names:
if check(name):
for result in filter_follow_imports(name.goto(), check):
yield result
else:
yield name
names = self._goto()
if follow_imports:
def check(name):
if isinstance(name, er.ModuleName):
return False
return name.api_type == 'module'
else:
def check(name):
return isinstance(name, imports.SubModuleName)
names = filter_follow_imports(names, check)
defs = [classes.Definition(self._evaluator, d) for d in set(names)]
return helpers.sorted_definitions(defs)
def _goto(self):
"""
Used for goto_assignments and usages.
"""
name = self._get_module_node().get_name_of_position(self._pos)
if name is None:
return []
context = self._evaluator.create_context(self._get_module(), name)
return list(self._evaluator.goto(context, name))
def usages(self, additional_module_paths=()):
"""
Return :class:`classes.Definition` objects, which contain all
names that point to the definition of the name under the cursor. This
is very useful for refactoring (renaming), or to show all usages of a
variable.
.. todo:: Implement additional_module_paths
:rtype: list of :class:`classes.Definition`
"""
temp, settings.dynamic_flow_information = \
settings.dynamic_flow_information, False
try:
module_node = self._get_module_node()
user_stmt = get_statement_of_position(module_node, self._pos)
definition_names = self._goto()
if not definition_names and isinstance(user_stmt, tree.Import):
# For not defined imports (goto doesn't find something, we take
# the name as a definition. This is enough, because every name
# points to it.
name = user_stmt.get_name_of_position(self._pos)
if name is None:
# Must be syntax
return []
definition_names = [TreeNameDefinition(self._get_module(), name)]
if not definition_names:
# Without a definition for a name we cannot find references.
return []
definition_names = usages.resolve_potential_imports(self._evaluator,
definition_names)
modules = set([d.get_root_context() for d in definition_names])
modules.add(self._get_module())
definitions = usages.usages(self._evaluator, definition_names, modules)
finally:
settings.dynamic_flow_information = temp
return helpers.sorted_definitions(set(definitions))
def call_signatures(self):
"""
Return the function object of the call you're currently in.
E.g. if the cursor is here::
abs(# <-- cursor is here
This would return the ``abs`` function. On the other hand::
abs()# <-- cursor is here
This would return an empty list..
:rtype: list of :class:`classes.CallSignature`
"""
call_signature_details = \
helpers.get_call_signature_details(self._get_module_node(), self._pos)
if call_signature_details is None:
return []
context = self._evaluator.create_context(
self._get_module(),
call_signature_details.bracket_leaf
)
definitions = helpers.cache_call_signatures(
self._evaluator,
context,
call_signature_details.bracket_leaf,
self._code_lines,
self._pos
)
debug.speed('func_call followed')
return [classes.CallSignature(self._evaluator, d.name,
call_signature_details.bracket_leaf.start_pos,
call_signature_details.call_index,
call_signature_details.keyword_name_str)
for d in definitions if hasattr(d, 'py__call__')]
def _analysis(self):
self._evaluator.is_analysis = True
module_node = self._get_module_node()
self._evaluator.analysis_modules = [module_node]
try:
for node in get_executable_nodes(module_node):
context = self._get_module().create_context(node)
if node.type in ('funcdef', 'classdef'):
# TODO This is stupid, should be private
from jedi.evaluate.finder import _name_to_types
# Resolve the decorators.
_name_to_types(self._evaluator, context, node.children[1])
elif isinstance(node, tree.Import):
import_names = set(node.get_defined_names())
if node.is_nested():
import_names |= set(path[-1] for path in node.get_paths())
for n in import_names:
imports.infer_import(context, n)
elif node.type == 'expr_stmt':
types = context.eval_node(node)
for testlist in node.children[:-1:2]:
# Iterate tuples.
unpack_tuple_to_dict(context, types, testlist)
else:
if node.type == 'name':
defs = self._evaluator.goto_definitions(context, node)
else:
defs = evaluate_call_of_leaf(context, node)
try_iter_content(defs)
self._evaluator.reset_recursion_limitations()
ana = [a for a in self._evaluator.analysis if self.path == a.path]
return sorted(set(ana), key=lambda x: x.line)
finally:
self._evaluator.is_analysis = False
class Interpreter(Script):
"""
Jedi API for Python REPLs.
In addition to completion of simple attribute access, Jedi
supports code completion based on static code analysis.
Jedi can complete attributes of object which is not initialized
yet.
>>> from os.path import join
>>> namespace = locals()
>>> script = Interpreter('join("").up', [namespace])
>>> print(script.completions()[0].name)
upper
"""
def __init__(self, source, namespaces, **kwds):
"""
Parse `source` and mixin interpreted Python objects from `namespaces`.
:type source: str
:arg source: Code to parse.
:type namespaces: list of dict
:arg namespaces: a list of namespace dictionaries such as the one
returned by :func:`locals`.
Other optional arguments are same as the ones for :class:`Script`.
If `line` and `column` are None, they are assumed be at the end of
`source`.
"""
try:
namespaces = [dict(n) for n in namespaces]
except Exception:
raise TypeError("namespaces must be a non-empty list of dicts.")
super(Interpreter, self).__init__(source, **kwds)
self.namespaces = namespaces
def _get_module(self):
parser_module = super(Interpreter, self)._get_module_node()
return interpreter.MixedModuleContext(
self._evaluator,
parser_module,
self.namespaces,
path=self.path
)
def names(source=None, path=None, encoding='utf-8', all_scopes=False,
definitions=True, references=False):
"""
Returns a list of `Definition` objects, containing name parts.
This means you can call ``Definition.goto_assignments()`` and get the
reference of a name.
The parameters are the same as in :py:class:`Script`, except or the
following ones:
:param all_scopes: If True lists the names of all scopes instead of only
the module namespace.
:param definitions: If True lists the names that have been defined by a
class, function or a statement (``a = b`` returns ``a``).
:param references: If True lists all the names that are not listed by
``definitions=True``. E.g. ``a = b`` returns ``b``.
"""
def def_ref_filter(_def):
is_def = _def._name.tree_name.is_definition()
return definitions and is_def or references and not is_def
# Set line/column to a random position, because they don't matter.
script = Script(source, line=1, column=0, path=path, encoding=encoding)
module_context = script._get_module()
defs = [
classes.Definition(
script._evaluator,
TreeNameDefinition(
module_context.create_context(name if name.parent.type == 'file_input' else name.parent),
name
)
) for name in get_module_names(script._get_module_node(), all_scopes)
]
return sorted(filter(def_ref_filter, defs), key=lambda x: (x.line, x.column))
def preload_module(*modules):
"""
Preloading modules tells Jedi to load a module now, instead of lazy parsing
of modules. Usful for IDEs, to control which modules to load on startup.
:param modules: different module names, list of string.
"""
for m in modules:
s = "import %s as x; x." % m
Script(s, 1, len(s), None).completions()
def set_debug_function(func_cb=debug.print_to_stdout, warnings=True,
notices=True, speed=True):
"""
Define a callback debug function to get all the debug messages.
If you don't specify any arguments, debug messages will be printed to stdout.
:param func_cb: The callback function for debug messages, with n params.
"""
debug.debug_function = func_cb
debug.enable_warning = warnings
debug.enable_notice = notices
debug.enable_speed = speed

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"""
The :mod:`jedi.api.classes` module contains the return classes of the API.
These classes are the much bigger part of the whole API, because they contain
the interesting information about completion and goto operations.
"""
import re
from parso.cache import parser_cache
from parso.python.tree import search_ancestor
from jedi._compatibility import u
from jedi import settings
from jedi import common
from jedi.cache import memoize_method
from jedi.evaluate import representation as er
from jedi.evaluate import instance
from jedi.evaluate import imports
from jedi.evaluate import compiled
from jedi.evaluate.filters import ParamName
from jedi.evaluate.imports import ImportName
from jedi.api.keywords import KeywordName
def _sort_names_by_start_pos(names):
return sorted(names, key=lambda s: s.start_pos or (0, 0))
def defined_names(evaluator, context):
"""
List sub-definitions (e.g., methods in class).
:type scope: Scope
:rtype: list of Definition
"""
filter = next(context.get_filters(search_global=True))
names = [name for name in filter.values()]
return [Definition(evaluator, n) for n in _sort_names_by_start_pos(names)]
class BaseDefinition(object):
_mapping = {
'posixpath': 'os.path',
'riscospath': 'os.path',
'ntpath': 'os.path',
'os2emxpath': 'os.path',
'macpath': 'os.path',
'genericpath': 'os.path',
'posix': 'os',
'_io': 'io',
'_functools': 'functools',
'_sqlite3': 'sqlite3',
'__builtin__': '',
'builtins': '',
}
_tuple_mapping = dict((tuple(k.split('.')), v) for (k, v) in {
'argparse._ActionsContainer': 'argparse.ArgumentParser',
}.items())
def __init__(self, evaluator, name):
self._evaluator = evaluator
self._name = name
"""
An instance of :class:`parso.reprsentation.Name` subclass.
"""
self.is_keyword = isinstance(self._name, KeywordName)
# generate a path to the definition
self._module = name.get_root_context()
if self.in_builtin_module():
self.module_path = None
else:
self.module_path = self._module.py__file__()
"""Shows the file path of a module. e.g. ``/usr/lib/python2.7/os.py``"""
@property
def name(self):
"""
Name of variable/function/class/module.
For example, for ``x = None`` it returns ``'x'``.
:rtype: str or None
"""
return self._name.string_name
@property
def type(self):
"""
The type of the definition.
Here is an example of the value of this attribute. Let's consider
the following source. As what is in ``variable`` is unambiguous
to Jedi, :meth:`jedi.Script.goto_definitions` should return a list of
definition for ``sys``, ``f``, ``C`` and ``x``.
>>> from jedi import Script
>>> source = '''
... import keyword
...
... class C:
... pass
...
... class D:
... pass
...
... x = D()
...
... def f():
... pass
...
... for variable in [keyword, f, C, x]:
... variable'''
>>> script = Script(source)
>>> defs = script.goto_definitions()
Before showing what is in ``defs``, let's sort it by :attr:`line`
so that it is easy to relate the result to the source code.
>>> defs = sorted(defs, key=lambda d: d.line)
>>> defs # doctest: +NORMALIZE_WHITESPACE
[<Definition module keyword>, <Definition class C>,
<Definition instance D>, <Definition def f>]
Finally, here is what you can get from :attr:`type`:
>>> defs[0].type
'module'
>>> defs[1].type
'class'
>>> defs[2].type
'instance'
>>> defs[3].type
'function'
"""
tree_name = self._name.tree_name
resolve = False
if tree_name is not None:
# TODO move this to their respective names.
definition = tree_name.get_definition()
if definition is not None and definition.type == 'import_from' and \
tree_name.is_definition():
resolve = True
if isinstance(self._name, imports.SubModuleName) or resolve:
for context in self._name.infer():
return context.api_type
return self._name.api_type
def _path(self):
"""The path to a module/class/function definition."""
def to_reverse():
name = self._name
if name.api_type == 'module':
try:
name = list(name.infer())[0].name
except IndexError:
pass
if name.api_type == 'module':
module_contexts = name.infer()
if module_contexts:
module_context, = module_contexts
for n in reversed(module_context.py__name__().split('.')):
yield n
else:
# We don't really know anything about the path here. This
# module is just an import that would lead in an
# ImportError. So simply return the name.
yield name.string_name
return
else:
yield name.string_name
parent_context = name.parent_context
while parent_context is not None:
try:
method = parent_context.py__name__
except AttributeError:
try:
yield parent_context.name.string_name
except AttributeError:
pass
else:
for name in reversed(method().split('.')):
yield name
parent_context = parent_context.parent_context
return reversed(list(to_reverse()))
@property
def module_name(self):
"""
The module name.
>>> from jedi import Script
>>> source = 'import json'
>>> script = Script(source, path='example.py')
>>> d = script.goto_definitions()[0]
>>> print(d.module_name) # doctest: +ELLIPSIS
json
"""
return self._module.name.string_name
def in_builtin_module(self):
"""Whether this is a builtin module."""
return isinstance(self._module, compiled.CompiledObject)
@property
def line(self):
"""The line where the definition occurs (starting with 1)."""
start_pos = self._name.start_pos
if start_pos is None:
return None
return start_pos[0]
@property
def column(self):
"""The column where the definition occurs (starting with 0)."""
start_pos = self._name.start_pos
if start_pos is None:
return None
return start_pos[1]
def docstring(self, raw=False, fast=True):
r"""
Return a document string for this completion object.
Example:
>>> from jedi import Script
>>> source = '''\
... def f(a, b=1):
... "Document for function f."
... '''
>>> script = Script(source, 1, len('def f'), 'example.py')
>>> doc = script.goto_definitions()[0].docstring()
>>> print(doc)
f(a, b=1)
<BLANKLINE>
Document for function f.
Notice that useful extra information is added to the actual
docstring. For function, it is call signature. If you need
actual docstring, use ``raw=True`` instead.
>>> print(script.goto_definitions()[0].docstring(raw=True))
Document for function f.
:param fast: Don't follow imports that are only one level deep like
``import foo``, but follow ``from foo import bar``. This makes
sense for speed reasons. Completing `import a` is slow if you use
the ``foo.docstring(fast=False)`` on every object, because it
parses all libraries starting with ``a``.
"""
return _Help(self._name).docstring(fast=fast, raw=raw)
@property
def description(self):
"""A textual description of the object."""
return u(self._name.string_name)
@property
def full_name(self):
"""
Dot-separated path of this object.
It is in the form of ``<module>[.<submodule>[...]][.<object>]``.
It is useful when you want to look up Python manual of the
object at hand.
Example:
>>> from jedi import Script
>>> source = '''
... import os
... os.path.join'''
>>> script = Script(source, 3, len('os.path.join'), 'example.py')
>>> print(script.goto_definitions()[0].full_name)
os.path.join
Notice that it returns ``'os.path.join'`` instead of (for example)
``'posixpath.join'``. This is not correct, since the modules name would
be ``<module 'posixpath' ...>```. However most users find the latter
more practical.
"""
path = list(self._path())
# TODO add further checks, the mapping should only occur on stdlib.
if not path:
return None # for keywords the path is empty
with common.ignored(KeyError):
path[0] = self._mapping[path[0]]
for key, repl in self._tuple_mapping.items():
if tuple(path[:len(key)]) == key:
path = [repl] + path[len(key):]
return '.'.join(path if path[0] else path[1:])
def goto_assignments(self):
if self._name.tree_name is None:
return self
names = self._evaluator.goto(self._name.parent_context, self._name.tree_name)
return [Definition(self._evaluator, n) for n in names]
def _goto_definitions(self):
# TODO make this function public.
return [Definition(self._evaluator, d.name) for d in self._name.infer()]
@property
@memoize_method
def params(self):
"""
Raises an ``AttributeError``if the definition is not callable.
Otherwise returns a list of `Definition` that represents the params.
"""
def get_param_names(context):
param_names = []
if context.api_type == 'function':
param_names = list(context.get_param_names())
if isinstance(context, instance.BoundMethod):
param_names = param_names[1:]
elif isinstance(context, (instance.AbstractInstanceContext, er.ClassContext)):
if isinstance(context, er.ClassContext):
search = '__init__'
else:
search = '__call__'
names = context.get_function_slot_names(search)
if not names:
return []
# Just take the first one here, not optimal, but currently
# there's no better solution.
inferred = names[0].infer()
param_names = get_param_names(next(iter(inferred)))
if isinstance(context, er.ClassContext):
param_names = param_names[1:]
return param_names
elif isinstance(context, compiled.CompiledObject):
return list(context.get_param_names())
return param_names
followed = list(self._name.infer())
if not followed or not hasattr(followed[0], 'py__call__'):
raise AttributeError()
context = followed[0] # only check the first one.
return [Definition(self._evaluator, n) for n in get_param_names(context)]
def parent(self):
context = self._name.parent_context
if context is None:
return None
if isinstance(context, er.FunctionExecutionContext):
# TODO the function context should be a part of the function
# execution context.
context = er.FunctionContext(
self._evaluator, context.parent_context, context.tree_node)
return Definition(self._evaluator, context.name)
def __repr__(self):
return "<%s %s>" % (type(self).__name__, self.description)
def get_line_code(self, before=0, after=0):
"""
Returns the line of code where this object was defined.
:param before: Add n lines before the current line to the output.
:param after: Add n lines after the current line to the output.
:return str: Returns the line(s) of code or an empty string if it's a
builtin.
"""
if self.in_builtin_module():
return ''
path = self._name.get_root_context().py__file__()
lines = parser_cache[self._evaluator.grammar._hashed][path].lines
index = self._name.start_pos[0] - 1
start_index = max(index - before, 0)
return ''.join(lines[start_index:index + after + 1])
class Completion(BaseDefinition):
"""
`Completion` objects are returned from :meth:`api.Script.completions`. They
provide additional information about a completion.
"""
def __init__(self, evaluator, name, stack, like_name_length):
super(Completion, self).__init__(evaluator, name)
self._like_name_length = like_name_length
self._stack = stack
# Completion objects with the same Completion name (which means
# duplicate items in the completion)
self._same_name_completions = []
def _complete(self, like_name):
append = ''
if settings.add_bracket_after_function \
and self.type == 'Function':
append = '('
if isinstance(self._name, ParamName) and self._stack is not None:
node_names = list(self._stack.get_node_names(self._evaluator.grammar._pgen_grammar))
if 'trailer' in node_names and 'argument' not in node_names:
append += '='
name = self._name.string_name
if like_name:
name = name[self._like_name_length:]
return name + append
@property
def complete(self):
"""
Return the rest of the word, e.g. completing ``isinstance``::
isinstan# <-- Cursor is here
would return the string 'ce'. It also adds additional stuff, depending
on your `settings.py`.
Assuming the following function definition::
def foo(param=0):
pass
completing ``foo(par`` would give a ``Completion`` which `complete`
would be `am=`
"""
return self._complete(True)
@property
def name_with_symbols(self):
"""
Similar to :attr:`name`, but like :attr:`name` returns also the
symbols, for example assuming the following function definition::
def foo(param=0):
pass
completing ``foo(`` would give a ``Completion`` which
``name_with_symbols`` would be "param=".
"""
return self._complete(False)
def docstring(self, raw=False, fast=True):
if self._like_name_length >= 3:
# In this case we can just resolve the like name, because we
# wouldn't load like > 100 Python modules anymore.
fast = False
return super(Completion, self).docstring(raw=raw, fast=fast)
@property
def description(self):
"""Provide a description of the completion object."""
# TODO improve the class structure.
return Definition.description.__get__(self)
def __repr__(self):
return '<%s: %s>' % (type(self).__name__, self._name.string_name)
@memoize_method
def follow_definition(self):
"""
Return the original definitions. I strongly recommend not using it for
your completions, because it might slow down |jedi|. If you want to
read only a few objects (<=20), it might be useful, especially to get
the original docstrings. The basic problem of this function is that it
follows all results. This means with 1000 completions (e.g. numpy),
it's just PITA-slow.
"""
defs = self._name.infer()
return [Definition(self._evaluator, d.name) for d in defs]
class Definition(BaseDefinition):
"""
*Definition* objects are returned from :meth:`api.Script.goto_assignments`
or :meth:`api.Script.goto_definitions`.
"""
def __init__(self, evaluator, definition):
super(Definition, self).__init__(evaluator, definition)
@property
def description(self):
"""
A description of the :class:`.Definition` object, which is heavily used
in testing. e.g. for ``isinstance`` it returns ``def isinstance``.
Example:
>>> from jedi import Script
>>> source = '''
... def f():
... pass
...
... class C:
... pass
...
... variable = f if random.choice([0,1]) else C'''
>>> script = Script(source, column=3) # line is maximum by default
>>> defs = script.goto_definitions()
>>> defs = sorted(defs, key=lambda d: d.line)
>>> defs
[<Definition def f>, <Definition class C>]
>>> str(defs[0].description) # strip literals in python2
'def f'
>>> str(defs[1].description)
'class C'
"""
typ = self.type
tree_name = self._name.tree_name
if typ in ('function', 'class', 'module', 'instance') or tree_name is None:
if typ == 'function':
# For the description we want a short and a pythonic way.
typ = 'def'
return typ + ' ' + u(self._name.string_name)
elif typ == 'param':
code = search_ancestor(tree_name, 'param').get_code(
include_prefix=False,
include_comma=False
)
return typ + ' ' + code
definition = tree_name.get_definition() or tree_name
# Remove the prefix, because that's not what we want for get_code
# here.
txt = definition.get_code(include_prefix=False)
# Delete comments:
txt = re.sub('#[^\n]+\n', ' ', txt)
# Delete multi spaces/newlines
txt = re.sub('\s+', ' ', txt).strip()
return txt
@property
def desc_with_module(self):
"""
In addition to the definition, also return the module.
.. warning:: Don't use this function yet, its behaviour may change. If
you really need it, talk to me.
.. todo:: Add full path. This function is should return a
`module.class.function` path.
"""
position = '' if self.in_builtin_module else '@%s' % (self.line)
return "%s:%s%s" % (self.module_name, self.description, position)
@memoize_method
def defined_names(self):
"""
List sub-definitions (e.g., methods in class).
:rtype: list of Definition
"""
defs = self._name.infer()
return sorted(
common.unite(defined_names(self._evaluator, d) for d in defs),
key=lambda s: s._name.start_pos or (0, 0)
)
def is_definition(self):
"""
Returns True, if defined as a name in a statement, function or class.
Returns False, if it's a reference to such a definition.
"""
if self._name.tree_name is None:
return True
else:
return self._name.tree_name.is_definition()
def __eq__(self, other):
return self._name.start_pos == other._name.start_pos \
and self.module_path == other.module_path \
and self.name == other.name \
and self._evaluator == other._evaluator
def __ne__(self, other):
return not self.__eq__(other)
def __hash__(self):
return hash((self._name.start_pos, self.module_path, self.name, self._evaluator))
class CallSignature(Definition):
"""
`CallSignature` objects is the return value of `Script.function_definition`.
It knows what functions you are currently in. e.g. `isinstance(` would
return the `isinstance` function. without `(` it would return nothing.
"""
def __init__(self, evaluator, executable_name, bracket_start_pos, index, key_name_str):
super(CallSignature, self).__init__(evaluator, executable_name)
self._index = index
self._key_name_str = key_name_str
self._bracket_start_pos = bracket_start_pos
@property
def index(self):
"""
The Param index of the current call.
Returns None if the index cannot be found in the curent call.
"""
if self._key_name_str is not None:
for i, param in enumerate(self.params):
if self._key_name_str == param.name:
return i
if self.params:
param_name = self.params[-1]._name
if param_name.tree_name is not None:
if param_name.tree_name.get_definition().star_count == 2:
return i
return None
if self._index >= len(self.params):
for i, param in enumerate(self.params):
tree_name = param._name.tree_name
if tree_name is not None:
# *args case
if tree_name.get_definition().star_count == 1:
return i
return None
return self._index
@property
def bracket_start(self):
"""
The indent of the bracket that is responsible for the last function
call.
"""
return self._bracket_start_pos
def __repr__(self):
return '<%s: %s index %s>' % \
(type(self).__name__, self._name.string_name, self.index)
class _Help(object):
"""
Temporary implementation, will be used as `Script.help() or something in
the future.
"""
def __init__(self, definition):
self._name = definition
@memoize_method
def _get_contexts(self, fast):
if isinstance(self._name, ImportName) and fast:
return {}
if self._name.api_type == 'statement':
return {}
return self._name.infer()
def docstring(self, fast=True, raw=True):
"""
The docstring ``__doc__`` for any object.
See :attr:`doc` for example.
"""
# TODO: Use all of the followed objects as output. Possibly divinding
# them by a few dashes.
for context in self._get_contexts(fast=fast):
return context.py__doc__(include_call_signature=not raw)
return ''

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from parso.python import token
from parso.python import tree
from parso.tree import search_ancestor, Leaf
from jedi import debug
from jedi import settings
from jedi.api import classes
from jedi.api import helpers
from jedi.evaluate import imports
from jedi.api import keywords
from jedi.evaluate.helpers import evaluate_call_of_leaf
from jedi.evaluate.filters import get_global_filters
from jedi.parser_utils import get_statement_of_position
def get_call_signature_param_names(call_signatures):
# add named params
for call_sig in call_signatures:
for p in call_sig.params:
# Allow protected access, because it's a public API.
tree_name = p._name.tree_name
# Compiled modules typically don't allow keyword arguments.
if tree_name is not None:
# Allow access on _definition here, because it's a
# public API and we don't want to make the internal
# Name object public.
tree_param = tree.search_ancestor(tree_name, 'param')
if tree_param.star_count == 0: # no *args/**kwargs
yield p._name
def filter_names(evaluator, completion_names, stack, like_name):
comp_dct = {}
for name in completion_names:
if settings.case_insensitive_completion \
and name.string_name.lower().startswith(like_name.lower()) \
or name.string_name.startswith(like_name):
new = classes.Completion(
evaluator,
name,
stack,
len(like_name)
)
k = (new.name, new.complete) # key
if k in comp_dct and settings.no_completion_duplicates:
comp_dct[k]._same_name_completions.append(new)
else:
comp_dct[k] = new
yield new
def get_user_scope(module_context, position):
"""
Returns the scope in which the user resides. This includes flows.
"""
user_stmt = get_statement_of_position(module_context.tree_node, position)
if user_stmt is None:
def scan(scope):
for s in scope.children:
if s.start_pos <= position <= s.end_pos:
if isinstance(s, (tree.Scope, tree.Flow)):
return scan(s) or s
elif s.type in ('suite', 'decorated'):
return scan(s)
return None
scanned_node = scan(module_context.tree_node)
if scanned_node:
return module_context.create_context(scanned_node, node_is_context=True)
return module_context
else:
return module_context.create_context(user_stmt)
def get_flow_scope_node(module_node, position):
node = module_node.get_leaf_for_position(position, include_prefixes=True)
while not isinstance(node, (tree.Scope, tree.Flow)):
node = node.parent
return node
class Completion:
def __init__(self, evaluator, module, code_lines, position, call_signatures_method):
self._evaluator = evaluator
self._module_context = module
self._module_node = module.tree_node
self._code_lines = code_lines
# The first step of completions is to get the name
self._like_name = helpers.get_on_completion_name(self._module_node, code_lines, position)
# The actual cursor position is not what we need to calculate
# everything. We want the start of the name we're on.
self._position = position[0], position[1] - len(self._like_name)
self._call_signatures_method = call_signatures_method
def completions(self):
completion_names = self._get_context_completions()
completions = filter_names(self._evaluator, completion_names,
self.stack, self._like_name)
return sorted(completions, key=lambda x: (x.name.startswith('__'),
x.name.startswith('_'),
x.name.lower()))
def _get_context_completions(self):
"""
Analyzes the context that a completion is made in and decides what to
return.
Technically this works by generating a parser stack and analysing the
current stack for possible grammar nodes.
Possible enhancements:
- global/nonlocal search global
- yield from / raise from <- could be only exceptions/generators
- In args: */**: no completion
- In params (also lambda): no completion before =
"""
grammar = self._evaluator.grammar
try:
self.stack = helpers.get_stack_at_position(
grammar, self._code_lines, self._module_node, self._position
)
except helpers.OnErrorLeaf as e:
self.stack = None
if e.error_leaf.value == '.':
# After ErrorLeaf's that are dots, we will not do any
# completions since this probably just confuses the user.
return []
# If we don't have a context, just use global completion.
return self._global_completions()
allowed_keywords, allowed_tokens = \
helpers.get_possible_completion_types(grammar._pgen_grammar, self.stack)
if 'if' in allowed_keywords:
leaf = self._module_node.get_leaf_for_position(self._position, include_prefixes=True)
previous_leaf = leaf.get_previous_leaf()
indent = self._position[1]
if not (leaf.start_pos <= self._position <= leaf.end_pos):
indent = leaf.start_pos[1]
if previous_leaf is not None:
stmt = previous_leaf
while True:
stmt = search_ancestor(
stmt, 'if_stmt', 'for_stmt', 'while_stmt', 'try_stmt',
'error_node',
)
if stmt is None:
break
type_ = stmt.type
if type_ == 'error_node':
first = stmt.children[0]
if isinstance(first, Leaf):
type_ = first.value + '_stmt'
# Compare indents
if stmt.start_pos[1] == indent:
if type_ == 'if_stmt':
allowed_keywords += ['elif', 'else']
elif type_ == 'try_stmt':
allowed_keywords += ['except', 'finally', 'else']
elif type_ == 'for_stmt':
allowed_keywords.append('else')
completion_names = list(self._get_keyword_completion_names(allowed_keywords))
if token.NAME in allowed_tokens or token.INDENT in allowed_tokens:
# This means that we actually have to do type inference.
symbol_names = list(self.stack.get_node_names(grammar._pgen_grammar))
nodes = list(self.stack.get_nodes())
if nodes and nodes[-1] in ('as', 'def', 'class'):
# No completions for ``with x as foo`` and ``import x as foo``.
# Also true for defining names as a class or function.
return list(self._get_class_context_completions(is_function=True))
elif "import_stmt" in symbol_names:
level, names = self._parse_dotted_names(nodes, "import_from" in symbol_names)
only_modules = not ("import_from" in symbol_names and 'import' in nodes)
completion_names += self._get_importer_names(
names,
level,
only_modules=only_modules,
)
elif symbol_names[-1] in ('trailer', 'dotted_name') and nodes[-1] == '.':
dot = self._module_node.get_leaf_for_position(self._position)
completion_names += self._trailer_completions(dot.get_previous_leaf())
else:
completion_names += self._global_completions()
completion_names += self._get_class_context_completions(is_function=False)
if 'trailer' in symbol_names:
call_signatures = self._call_signatures_method()
completion_names += get_call_signature_param_names(call_signatures)
return completion_names
def _get_keyword_completion_names(self, keywords_):
for k in keywords_:
yield keywords.keyword(self._evaluator, k).name
def _global_completions(self):
context = get_user_scope(self._module_context, self._position)
debug.dbg('global completion scope: %s', context)
flow_scope_node = get_flow_scope_node(self._module_node, self._position)
filters = get_global_filters(
self._evaluator,
context,
self._position,
origin_scope=flow_scope_node
)
completion_names = []
for filter in filters:
completion_names += filter.values()
return completion_names
def _trailer_completions(self, previous_leaf):
user_context = get_user_scope(self._module_context, self._position)
evaluation_context = self._evaluator.create_context(
self._module_context, previous_leaf
)
contexts = evaluate_call_of_leaf(evaluation_context, previous_leaf)
completion_names = []
debug.dbg('trailer completion contexts: %s', contexts)
for context in contexts:
for filter in context.get_filters(
search_global=False, origin_scope=user_context.tree_node):
completion_names += filter.values()
return completion_names
def _parse_dotted_names(self, nodes, is_import_from):
level = 0
names = []
for node in nodes[1:]:
if node in ('.', '...'):
if not names:
level += len(node.value)
elif node.type == 'dotted_name':
names += node.children[::2]
elif node.type == 'name':
names.append(node)
elif node == ',':
if not is_import_from:
names = []
else:
# Here if the keyword `import` comes along it stops checking
# for names.
break
return level, names
def _get_importer_names(self, names, level=0, only_modules=True):
names = [n.value for n in names]
i = imports.Importer(self._evaluator, names, self._module_context, level)
return i.completion_names(self._evaluator, only_modules=only_modules)
def _get_class_context_completions(self, is_function=True):
"""
Autocomplete inherited methods when overriding in child class.
"""
leaf = self._module_node.get_leaf_for_position(self._position, include_prefixes=True)
cls = tree.search_ancestor(leaf, 'classdef')
if isinstance(cls, (tree.Class, tree.Function)):
# Complete the methods that are defined in the super classes.
random_context = self._module_context.create_context(
cls,
node_is_context=True
)
else:
return
if cls.start_pos[1] >= leaf.start_pos[1]:
return
filters = random_context.get_filters(search_global=False, is_instance=True)
# The first dict is the dictionary of class itself.
next(filters)
for filter in filters:
for name in filter.values():
if (name.api_type == 'function') == is_function:
yield name

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"""
Helpers for the API
"""
import re
from collections import namedtuple
from textwrap import dedent
from parso.python.parser import Parser
from parso.python import tree
from parso import split_lines
from jedi._compatibility import u
from jedi.evaluate.helpers import evaluate_call_of_leaf
from jedi.cache import time_cache
CompletionParts = namedtuple('CompletionParts', ['path', 'has_dot', 'name'])
def sorted_definitions(defs):
# Note: `or ''` below is required because `module_path` could be
return sorted(defs, key=lambda x: (x.module_path or '', x.line or 0, x.column or 0))
def get_on_completion_name(module_node, lines, position):
leaf = module_node.get_leaf_for_position(position)
if leaf is None or leaf.type in ('string', 'error_leaf'):
# Completions inside strings are a bit special, we need to parse the
# string. The same is true for comments and error_leafs.
line = lines[position[0] - 1]
# The first step of completions is to get the name
return re.search(r'(?!\d)\w+$|$', line[:position[1]]).group(0)
elif leaf.type not in ('name', 'keyword'):
return ''
return leaf.value[:position[1] - leaf.start_pos[1]]
def _get_code(code_lines, start_pos, end_pos):
# Get relevant lines.
lines = code_lines[start_pos[0] - 1:end_pos[0]]
# Remove the parts at the end of the line.
lines[-1] = lines[-1][:end_pos[1]]
# Remove first line indentation.
lines[0] = lines[0][start_pos[1]:]
return '\n'.join(lines)
class OnErrorLeaf(Exception):
@property
def error_leaf(self):
return self.args[0]
def _is_on_comment(leaf, position):
comment_lines = split_lines(leaf.prefix)
difference = leaf.start_pos[0] - position[0]
prefix_start_pos = leaf.get_start_pos_of_prefix()
if difference == 0:
indent = leaf.start_pos[1]
elif position[0] == prefix_start_pos[0]:
indent = prefix_start_pos[1]
else:
indent = 0
line = comment_lines[-difference - 1][:position[1] - indent]
return '#' in line
def _get_code_for_stack(code_lines, module_node, position):
leaf = module_node.get_leaf_for_position(position, include_prefixes=True)
# It might happen that we're on whitespace or on a comment. This means
# that we would not get the right leaf.
if leaf.start_pos >= position:
if _is_on_comment(leaf, position):
return u('')
# If we're not on a comment simply get the previous leaf and proceed.
leaf = leaf.get_previous_leaf()
if leaf is None:
return u('') # At the beginning of the file.
is_after_newline = leaf.type == 'newline'
while leaf.type == 'newline':
leaf = leaf.get_previous_leaf()
if leaf is None:
return u('')
if leaf.type == 'error_leaf' or leaf.type == 'string':
if leaf.start_pos[0] < position[0]:
# On a different line, we just begin anew.
return u('')
# Error leafs cannot be parsed, completion in strings is also
# impossible.
raise OnErrorLeaf(leaf)
else:
user_stmt = leaf
while True:
if user_stmt.parent.type in ('file_input', 'suite', 'simple_stmt'):
break
user_stmt = user_stmt.parent
if is_after_newline:
if user_stmt.start_pos[1] > position[1]:
# This means that it's actually a dedent and that means that we
# start without context (part of a suite).
return u('')
# This is basically getting the relevant lines.
return _get_code(code_lines, user_stmt.get_start_pos_of_prefix(), position)
def get_stack_at_position(grammar, code_lines, module_node, pos):
"""
Returns the possible node names (e.g. import_from, xor_test or yield_stmt).
"""
class EndMarkerReached(Exception):
pass
def tokenize_without_endmarker(code):
# TODO This is for now not an official parso API that exists purely
# for Jedi.
tokens = grammar._tokenize(code)
for token_ in tokens:
if token_.string == safeword:
raise EndMarkerReached()
else:
yield token_
# The code might be indedented, just remove it.
code = dedent(_get_code_for_stack(code_lines, module_node, pos))
# We use a word to tell Jedi when we have reached the start of the
# completion.
# Use Z as a prefix because it's not part of a number suffix.
safeword = 'ZZZ_USER_WANTS_TO_COMPLETE_HERE_WITH_JEDI'
code = code + safeword
p = Parser(grammar._pgen_grammar, error_recovery=True)
try:
p.parse(tokens=tokenize_without_endmarker(code))
except EndMarkerReached:
return Stack(p.pgen_parser.stack)
raise SystemError("This really shouldn't happen. There's a bug in Jedi.")
class Stack(list):
def get_node_names(self, grammar):
for dfa, state, (node_number, nodes) in self:
yield grammar.number2symbol[node_number]
def get_nodes(self):
for dfa, state, (node_number, nodes) in self:
for node in nodes:
yield node
def get_possible_completion_types(pgen_grammar, stack):
def add_results(label_index):
try:
grammar_labels.append(inversed_tokens[label_index])
except KeyError:
try:
keywords.append(inversed_keywords[label_index])
except KeyError:
t, v = pgen_grammar.labels[label_index]
assert t >= 256
# See if it's a symbol and if we're in its first set
inversed_keywords
itsdfa = pgen_grammar.dfas[t]
itsstates, itsfirst = itsdfa
for first_label_index in itsfirst.keys():
add_results(first_label_index)
inversed_keywords = dict((v, k) for k, v in pgen_grammar.keywords.items())
inversed_tokens = dict((v, k) for k, v in pgen_grammar.tokens.items())
keywords = []
grammar_labels = []
def scan_stack(index):
dfa, state, node = stack[index]
states, first = dfa
arcs = states[state]
for label_index, new_state in arcs:
if label_index == 0:
# An accepting state, check the stack below.
scan_stack(index - 1)
else:
add_results(label_index)
scan_stack(-1)
return keywords, grammar_labels
def evaluate_goto_definition(evaluator, context, leaf):
if leaf.type == 'name':
# In case of a name we can just use goto_definition which does all the
# magic itself.
return evaluator.goto_definitions(context, leaf)
parent = leaf.parent
if parent.type == 'atom':
return context.eval_node(leaf.parent)
elif parent.type == 'trailer':
return evaluate_call_of_leaf(context, leaf)
elif isinstance(leaf, tree.Literal):
return context.evaluator.eval_atom(context, leaf)
return []
CallSignatureDetails = namedtuple(
'CallSignatureDetails',
['bracket_leaf', 'call_index', 'keyword_name_str']
)
def _get_index_and_key(nodes, position):
"""
Returns the amount of commas and the keyword argument string.
"""
nodes_before = [c for c in nodes if c.start_pos < position]
if nodes_before[-1].type == 'arglist':
nodes_before = [c for c in nodes_before[-1].children if c.start_pos < position]
key_str = None
if nodes_before:
last = nodes_before[-1]
if last.type == 'argument' and last.children[1].end_pos <= position:
# Checked if the argument
key_str = last.children[0].value
elif last == '=':
key_str = nodes_before[-2].value
return nodes_before.count(','), key_str
def _get_call_signature_details_from_error_node(node, position):
for index, element in reversed(list(enumerate(node.children))):
# `index > 0` means that it's a trailer and not an atom.
if element == '(' and element.end_pos <= position and index > 0:
# It's an error node, we don't want to match too much, just
# until the parentheses is enough.
children = node.children[index:]
name = element.get_previous_leaf()
if name is None:
continue
if name.type == 'name' or name.parent.type in ('trailer', 'atom'):
return CallSignatureDetails(
element,
*_get_index_and_key(children, position)
)
def get_call_signature_details(module, position):
leaf = module.get_leaf_for_position(position, include_prefixes=True)
if leaf.start_pos >= position:
# Whitespace / comments after the leaf count towards the previous leaf.
leaf = leaf.get_previous_leaf()
if leaf is None:
return None
if leaf == ')':
if leaf.end_pos == position:
leaf = leaf.get_next_leaf()
# Now that we know where we are in the syntax tree, we start to look at
# parents for possible function definitions.
node = leaf.parent
while node is not None:
if node.type in ('funcdef', 'classdef'):
# Don't show call signatures if there's stuff before it that just
# makes it feel strange to have a call signature.
return None
for n in node.children[::-1]:
if n.start_pos < position and n.type == 'error_node':
result = _get_call_signature_details_from_error_node(n, position)
if result is not None:
return result
if node.type == 'trailer' and node.children[0] == '(':
leaf = node.get_previous_leaf()
if leaf is None:
return None
return CallSignatureDetails(
node.children[0], *_get_index_and_key(node.children, position))
node = node.parent
return None
@time_cache("call_signatures_validity")
def cache_call_signatures(evaluator, context, bracket_leaf, code_lines, user_pos):
"""This function calculates the cache key."""
index = user_pos[0] - 1
before_cursor = code_lines[index][:user_pos[1]]
other_lines = code_lines[bracket_leaf.start_pos[0]:index]
whole = '\n'.join(other_lines + [before_cursor])
before_bracket = re.match(r'.*\(', whole, re.DOTALL)
module_path = context.get_root_context().py__file__()
if module_path is None:
yield None # Don't cache!
else:
yield (module_path, before_bracket, bracket_leaf.start_pos)
yield evaluate_goto_definition(
evaluator,
context,
bracket_leaf.get_previous_leaf()
)

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"""
TODO Some parts of this module are still not well documented.
"""
from jedi.evaluate.representation import ModuleContext
from jedi.evaluate import compiled
from jedi.evaluate.compiled import mixed
from jedi.evaluate.context import Context
class NamespaceObject(object):
def __init__(self, dct):
self.__dict__ = dct
class MixedModuleContext(Context):
resets_positions = True
type = 'mixed_module'
def __init__(self, evaluator, tree_module, namespaces, path):
self.evaluator = evaluator
self._namespaces = namespaces
self._namespace_objects = [NamespaceObject(n) for n in namespaces]
self._module_context = ModuleContext(evaluator, tree_module, path=path)
self.tree_node = tree_module
def get_node(self):
return self.tree_node
def get_filters(self, *args, **kwargs):
for filter in self._module_context.get_filters(*args, **kwargs):
yield filter
for namespace_obj in self._namespace_objects:
compiled_object = compiled.create(self.evaluator, namespace_obj)
mixed_object = mixed.MixedObject(
self.evaluator,
parent_context=self,
compiled_object=compiled_object,
tree_context=self._module_context
)
for filter in mixed_object.get_filters(*args, **kwargs):
yield filter
def __getattr__(self, name):
return getattr(self._module_context, name)

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import pydoc
import keyword
from jedi._compatibility import is_py3, is_py35
from jedi import common
from jedi.evaluate.filters import AbstractNameDefinition
from parso.python.tree import Leaf
try:
from pydoc_data import topics as pydoc_topics
except ImportError:
# Python 2
try:
import pydoc_topics
except ImportError:
# This is for Python 3 embeddable version, which dont have
# pydoc_data module in its file python3x.zip.
pydoc_topics = None
if is_py3:
if is_py35:
# in python 3.5 async and await are not proper keywords, but for
# completion pursposes should as as though they are
keys = keyword.kwlist + ["async", "await"]
else:
keys = keyword.kwlist
else:
keys = keyword.kwlist + ['None', 'False', 'True']
def has_inappropriate_leaf_keyword(pos, module):
relevant_errors = filter(
lambda error: error.first_pos[0] == pos[0],
module.error_statement_stacks)
for error in relevant_errors:
if error.next_token in keys:
return True
return False
def completion_names(evaluator, stmt, pos, module):
keyword_list = all_keywords(evaluator)
if not isinstance(stmt, Leaf) or has_inappropriate_leaf_keyword(pos, module):
keyword_list = filter(
lambda keyword: not keyword.only_valid_as_leaf,
keyword_list
)
return [keyword.name for keyword in keyword_list]
def all_keywords(evaluator, pos=(0, 0)):
return set([Keyword(evaluator, k, pos) for k in keys])
def keyword(evaluator, string, pos=(0, 0)):
if string in keys:
return Keyword(evaluator, string, pos)
else:
return None
def get_operator(evaluator, string, pos):
return Keyword(evaluator, string, pos)
keywords_only_valid_as_leaf = (
'continue',
'break',
)
class KeywordName(AbstractNameDefinition):
api_type = 'keyword'
def __init__(self, evaluator, name):
self.evaluator = evaluator
self.string_name = name
self.parent_context = evaluator.BUILTINS
def eval(self):
return set()
def infer(self):
return [Keyword(self.evaluator, self.string_name, (0, 0))]
class Keyword(object):
api_type = 'keyword'
def __init__(self, evaluator, name, pos):
self.name = KeywordName(evaluator, name)
self.start_pos = pos
self.parent = evaluator.BUILTINS
@property
def only_valid_as_leaf(self):
return self.name.value in keywords_only_valid_as_leaf
@property
def names(self):
""" For a `parsing.Name` like comparision """
return [self.name]
def py__doc__(self, include_call_signature=False):
return imitate_pydoc(self.name.string_name)
def __repr__(self):
return '<%s: %s>' % (type(self).__name__, self.name)
def imitate_pydoc(string):
"""
It's not possible to get the pydoc's without starting the annoying pager
stuff.
"""
if pydoc_topics is None:
return ''
# str needed because of possible unicode stuff in py2k (pydoc doesn't work
# with unicode strings)
string = str(string)
h = pydoc.help
with common.ignored(KeyError):
# try to access symbols
string = h.symbols[string]
string, _, related = string.partition(' ')
get_target = lambda s: h.topics.get(s, h.keywords.get(s))
while isinstance(string, str):
string = get_target(string)
try:
# is a tuple now
label, related = string
except TypeError:
return ''
try:
return pydoc_topics.topics[label].strip() if pydoc_topics else ''
except KeyError:
return ''

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"""
To use Jedi completion in Python interpreter, add the following in your shell
setup (e.g., ``.bashrc``)::
export PYTHONSTARTUP="$(python -m jedi repl)"
Then you will be able to use Jedi completer in your Python interpreter::
$ python
Python 2.7.2+ (default, Jul 20 2012, 22:15:08)
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.path.join().split().in<TAB> # doctest: +SKIP
os.path.join().split().index os.path.join().split().insert
"""
import jedi.utils
from jedi import __version__ as __jedi_version__
print('REPL completion using Jedi %s' % __jedi_version__)
jedi.utils.setup_readline()
del jedi
# Note: try not to do many things here, as it will contaminate global
# namespace of the interpreter.

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from jedi.api import classes
from parso.python import tree
from jedi.evaluate import imports
from jedi.evaluate.filters import TreeNameDefinition
from jedi.evaluate.representation import ModuleContext
def compare_contexts(c1, c2):
return c1 == c2 or (c1[1] == c2[1] and c1[0].tree_node == c2[0].tree_node)
def usages(evaluator, definition_names, mods):
"""
:param definitions: list of Name
"""
def resolve_names(definition_names):
for name in definition_names:
if name.api_type == 'module':
found = False
for context in name.infer():
if isinstance(context, ModuleContext):
found = True
yield context.name
if not found:
yield name
else:
yield name
def compare_array(definition_names):
""" `definitions` are being compared by module/start_pos, because
sometimes the id's of the objects change (e.g. executions).
"""
return [
(name.get_root_context(), name.start_pos)
for name in resolve_names(definition_names)
]
search_name = list(definition_names)[0].string_name
compare_definitions = compare_array(definition_names)
mods = mods | set([d.get_root_context() for d in definition_names])
definition_names = set(resolve_names(definition_names))
for m in imports.get_modules_containing_name(evaluator, mods, search_name):
if isinstance(m, ModuleContext):
for name_node in m.tree_node.get_used_names().get(search_name, []):
context = evaluator.create_context(m, name_node)
result = evaluator.goto(context, name_node)
if any(compare_contexts(c1, c2)
for c1 in compare_array(result)
for c2 in compare_definitions):
name = TreeNameDefinition(context, name_node)
definition_names.add(name)
# Previous definitions might be imports, so include them
# (because goto might return that import name).
compare_definitions += compare_array([name])
else:
# compiled objects
definition_names.add(m.name)
return [classes.Definition(evaluator, n) for n in definition_names]
def resolve_potential_imports(evaluator, definitions):
""" Adds the modules of the imports """
new = set()
for d in definitions:
if isinstance(d, TreeNameDefinition):
imp_or_stmt = d.tree_name.get_definition()
if isinstance(imp_or_stmt, tree.Import):
new |= resolve_potential_imports(
evaluator,
set(imports.infer_import(
d.parent_context, d.tree_name, is_goto=True
))
)
return set(definitions) | new

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"""
This caching is very important for speed and memory optimizations. There's
nothing really spectacular, just some decorators. The following cache types are
available:
- ``time_cache`` can be used to cache something for just a limited time span,
which can be useful if there's user interaction and the user cannot react
faster than a certain time.
This module is one of the reasons why |jedi| is not thread-safe. As you can see
there are global variables, which are holding the cache information. Some of
these variables are being cleaned after every API usage.
"""
import time
import inspect
from jedi import settings
from parso.cache import parser_cache
_time_caches = {}
def underscore_memoization(func):
"""
Decorator for methods::
class A(object):
def x(self):
if self._x:
self._x = 10
return self._x
Becomes::
class A(object):
@underscore_memoization
def x(self):
return 10
A now has an attribute ``_x`` written by this decorator.
"""
name = '_' + func.__name__
def wrapper(self):
try:
return getattr(self, name)
except AttributeError:
result = func(self)
if inspect.isgenerator(result):
result = list(result)
setattr(self, name, result)
return result
return wrapper
def clear_time_caches(delete_all=False):
""" Jedi caches many things, that should be completed after each completion
finishes.
:param delete_all: Deletes also the cache that is normally not deleted,
like parser cache, which is important for faster parsing.
"""
global _time_caches
if delete_all:
for cache in _time_caches.values():
cache.clear()
parser_cache.clear()
else:
# normally just kill the expired entries, not all
for tc in _time_caches.values():
# check time_cache for expired entries
for key, (t, value) in list(tc.items()):
if t < time.time():
# delete expired entries
del tc[key]
def time_cache(time_add_setting):
"""
This decorator works as follows: Call it with a setting and after that
use the function with a callable that returns the key.
But: This function is only called if the key is not available. After a
certain amount of time (`time_add_setting`) the cache is invalid.
If the given key is None, the function will not be cached.
"""
def _temp(key_func):
dct = {}
_time_caches[time_add_setting] = dct
def wrapper(*args, **kwargs):
generator = key_func(*args, **kwargs)
key = next(generator)
try:
expiry, value = dct[key]
if expiry > time.time():
return value
except KeyError:
pass
value = next(generator)
time_add = getattr(settings, time_add_setting)
if key is not None:
dct[key] = time.time() + time_add, value
return value
return wrapper
return _temp
def memoize_method(method):
"""A normal memoize function."""
def wrapper(self, *args, **kwargs):
cache_dict = self.__dict__.setdefault('_memoize_method_dct', {})
dct = cache_dict.setdefault(method, {})
key = (args, frozenset(kwargs.items()))
try:
return dct[key]
except KeyError:
result = method(self, *args, **kwargs)
dct[key] = result
return result
return wrapper

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@ -0,0 +1,111 @@
""" A universal module with functions / classes without dependencies. """
import sys
import contextlib
import functools
from jedi._compatibility import reraise
from jedi import settings
class UncaughtAttributeError(Exception):
"""
Important, because `__getattr__` and `hasattr` catch AttributeErrors
implicitly. This is really evil (mainly because of `__getattr__`).
`hasattr` in Python 2 is even more evil, because it catches ALL exceptions.
Therefore this class originally had to be derived from `BaseException`
instead of `Exception`. But because I removed relevant `hasattr` from
the code base, we can now switch back to `Exception`.
:param base: return values of sys.exc_info().
"""
def safe_property(func):
return property(reraise_uncaught(func))
def reraise_uncaught(func):
"""
Re-throw uncaught `AttributeError`.
Usage: Put ``@rethrow_uncaught`` in front of the function
which does **not** suppose to raise `AttributeError`.
AttributeError is easily get caught by `hasattr` and another
``except AttributeError`` clause. This becomes problem when you use
a lot of "dynamic" attributes (e.g., using ``@property``) because you
can't distinguish if the property does not exist for real or some code
inside of the "dynamic" attribute through that error. In a well
written code, such error should not exist but getting there is very
difficult. This decorator is to help us getting there by changing
`AttributeError` to `UncaughtAttributeError` to avoid unexpected catch.
This helps us noticing bugs earlier and facilitates debugging.
.. note:: Treating StopIteration here is easy.
Add that feature when needed.
"""
@functools.wraps(func)
def wrapper(*args, **kwds):
try:
return func(*args, **kwds)
except AttributeError:
exc_info = sys.exc_info()
reraise(UncaughtAttributeError(exc_info[1]), exc_info[2])
return wrapper
class PushBackIterator(object):
def __init__(self, iterator):
self.pushes = []
self.iterator = iterator
self.current = None
def push_back(self, value):
self.pushes.append(value)
def __iter__(self):
return self
def next(self):
""" Python 2 Compatibility """
return self.__next__()
def __next__(self):
if self.pushes:
self.current = self.pushes.pop()
else:
self.current = next(self.iterator)
return self.current
def indent_block(text, indention=' '):
"""This function indents a text block with a default of four spaces."""
temp = ''
while text and text[-1] == '\n':
temp += text[-1]
text = text[:-1]
lines = text.split('\n')
return '\n'.join(map(lambda s: indention + s, lines)) + temp
@contextlib.contextmanager
def ignored(*exceptions):
"""
Context manager that ignores all of the specified exceptions. This will
be in the standard library starting with Python 3.4.
"""
try:
yield
except exceptions:
pass
def unite(iterable):
"""Turns a two dimensional array into a one dimensional."""
return set(typ for types in iterable for typ in types)
def to_list(func):
def wrapper(*args, **kwargs):
return list(func(*args, **kwargs))
return wrapper

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from jedi._compatibility import encoding, is_py3, u
import os
import time
def _lazy_colorama_init():
"""
Lazily init colorama if necessary, not to screw up stdout is debug not
enabled.
This version of the function does nothing.
"""
pass
_inited=False
try:
if os.name == 'nt':
# Does not work on Windows, as pyreadline and colorama interfere
raise ImportError
else:
# Use colorama for nicer console output.
from colorama import Fore, init
from colorama import initialise
def _lazy_colorama_init():
"""
Lazily init colorama if necessary, not to screw up stdout is
debug not enabled.
This version of the function does init colorama.
"""
global _inited
if not _inited:
# pytest resets the stream at the end - causes troubles. Since
# after every output the stream is reset automatically we don't
# need this.
initialise.atexit_done = True
try:
init()
except Exception:
# Colorama fails with initializing under vim and is buggy in
# version 0.3.6.
pass
_inited = True
except ImportError:
class Fore(object):
RED = ''
GREEN = ''
YELLOW = ''
MAGENTA = ''
RESET = ''
NOTICE = object()
WARNING = object()
SPEED = object()
enable_speed = False
enable_warning = False
enable_notice = False
# callback, interface: level, str
debug_function = None
_debug_indent = 0
_start_time = time.time()
def reset_time():
global _start_time, _debug_indent
_start_time = time.time()
_debug_indent = 0
def increase_indent(func):
"""Decorator for makin """
def wrapper(*args, **kwargs):
global _debug_indent
_debug_indent += 1
try:
return func(*args, **kwargs)
finally:
_debug_indent -= 1
return wrapper
def dbg(message, *args, **kwargs):
""" Looks at the stack, to see if a debug message should be printed. """
# Python 2 compatibility, because it doesn't understand default args
color = kwargs.pop('color', 'GREEN')
assert color
if debug_function and enable_notice:
i = ' ' * _debug_indent
_lazy_colorama_init()
debug_function(color, i + 'dbg: ' + message % tuple(u(repr(a)) for a in args))
def warning(message, *args, **kwargs):
format = kwargs.pop('format', True)
assert not kwargs
if debug_function and enable_warning:
i = ' ' * _debug_indent
if format:
message = message % tuple(u(repr(a)) for a in args)
debug_function('RED', i + 'warning: ' + message)
def speed(name):
if debug_function and enable_speed:
now = time.time()
i = ' ' * _debug_indent
debug_function('YELLOW', i + 'speed: ' + '%s %s' % (name, now - _start_time))
def print_to_stdout(color, str_out):
"""
The default debug function that prints to standard out.
:param str color: A string that is an attribute of ``colorama.Fore``.
"""
col = getattr(Fore, color)
_lazy_colorama_init()
if not is_py3:
str_out = str_out.encode(encoding, 'replace')
print(col + str_out + Fore.RESET)
# debug_function = print_to_stdout

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"""
Evaluation of Python code in |jedi| is based on three assumptions:
* The code uses as least side effects as possible. Jedi understands certain
list/tuple/set modifications, but there's no guarantee that Jedi detects
everything (list.append in different modules for example).
* No magic is being used:
- metaclasses
- ``setattr()`` / ``__import__()``
- writing to ``globals()``, ``locals()``, ``object.__dict__``
* The programmer is not a total dick, e.g. like `this
<https://github.com/davidhalter/jedi/issues/24>`_ :-)
The actual algorithm is based on a principle called lazy evaluation. If you
don't know about it, google it. That said, the typical entry point for static
analysis is calling ``eval_statement``. There's separate logic for
autocompletion in the API, the evaluator is all about evaluating an expression.
Now you need to understand what follows after ``eval_statement``. Let's
make an example::
import datetime
datetime.date.toda# <-- cursor here
First of all, this module doesn't care about completion. It really just cares
about ``datetime.date``. At the end of the procedure ``eval_statement`` will
return the ``date`` class.
To *visualize* this (simplified):
- ``Evaluator.eval_statement`` doesn't do much, because there's no assignment.
- ``Evaluator.eval_element`` cares for resolving the dotted path
- ``Evaluator.find_types`` searches for global definitions of datetime, which
it finds in the definition of an import, by scanning the syntax tree.
- Using the import logic, the datetime module is found.
- Now ``find_types`` is called again by ``eval_element`` to find ``date``
inside the datetime module.
Now what would happen if we wanted ``datetime.date.foo.bar``? Two more
calls to ``find_types``. However the second call would be ignored, because the
first one would return nothing (there's no foo attribute in ``date``).
What if the import would contain another ``ExprStmt`` like this::
from foo import bar
Date = bar.baz
Well... You get it. Just another ``eval_statement`` recursion. It's really
easy. Python can obviously get way more complicated then this. To understand
tuple assignments, list comprehensions and everything else, a lot more code had
to be written.
Jedi has been tested very well, so you can just start modifying code. It's best
to write your own test first for your "new" feature. Don't be scared of
breaking stuff. As long as the tests pass, you're most likely to be fine.
I need to mention now that lazy evaluation is really good because it
only *evaluates* what needs to be *evaluated*. All the statements and modules
that are not used are just being ignored.
"""
import copy
import sys
from parso.python import tree
import parso
from jedi import debug
from jedi.common import unite
from jedi.evaluate import representation as er
from jedi.evaluate import imports
from jedi.evaluate import recursion
from jedi.evaluate import iterable
from jedi.evaluate.cache import evaluator_function_cache
from jedi.evaluate import stdlib
from jedi.evaluate import finder
from jedi.evaluate import compiled
from jedi.evaluate import precedence
from jedi.evaluate import param
from jedi.evaluate import helpers
from jedi.evaluate import pep0484
from jedi.evaluate.filters import TreeNameDefinition, ParamName
from jedi.evaluate.instance import AnonymousInstance, BoundMethod
from jedi.evaluate.context import ContextualizedName, ContextualizedNode
from jedi import parser_utils
def _limit_context_infers(func):
"""
This is for now the way how we limit type inference going wild. There are
other ways to ensure recursion limits as well. This is mostly necessary
because of instance (self) access that can be quite tricky to limit.
I'm still not sure this is the way to go, but it looks okay for now and we
can still go anther way in the future. Tests are there. ~ dave
"""
def wrapper(evaluator, context, *args, **kwargs):
n = context.tree_node
try:
evaluator.inferred_element_counts[n] += 1
if evaluator.inferred_element_counts[n] > 300:
debug.warning('In context %s there were too many inferences.', n)
return set()
except KeyError:
evaluator.inferred_element_counts[n] = 1
return func(evaluator, context, *args, **kwargs)
return wrapper
class Evaluator(object):
def __init__(self, grammar, sys_path=None):
self.grammar = grammar
self.latest_grammar = parso.load_grammar(version='3.6')
self.memoize_cache = {} # for memoize decorators
# To memorize modules -> equals `sys.modules`.
self.modules = {} # like `sys.modules`.
self.compiled_cache = {} # see `evaluate.compiled.create()`
self.inferred_element_counts = {}
self.mixed_cache = {} # see `evaluate.compiled.mixed._create()`
self.analysis = []
self.dynamic_params_depth = 0
self.is_analysis = False
self.python_version = sys.version_info[:2]
if sys_path is None:
sys_path = sys.path
self.sys_path = copy.copy(sys_path)
try:
self.sys_path.remove('')
except ValueError:
pass
self.reset_recursion_limitations()
# Constants
self.BUILTINS = compiled.get_special_object(self, 'BUILTINS')
def reset_recursion_limitations(self):
self.recursion_detector = recursion.RecursionDetector()
self.execution_recursion_detector = recursion.ExecutionRecursionDetector(self)
def find_types(self, context, name_or_str, name_context, position=None,
search_global=False, is_goto=False, analysis_errors=True):
"""
This is the search function. The most important part to debug.
`remove_statements` and `filter_statements` really are the core part of
this completion.
:param position: Position of the last statement -> tuple of line, column
:return: List of Names. Their parents are the types.
"""
f = finder.NameFinder(self, context, name_context, name_or_str,
position, analysis_errors=analysis_errors)
filters = f.get_filters(search_global)
if is_goto:
return f.filter_name(filters)
return f.find(filters, attribute_lookup=not search_global)
@_limit_context_infers
def eval_statement(self, context, stmt, seek_name=None):
with recursion.execution_allowed(self, stmt) as allowed:
if allowed or context.get_root_context() == self.BUILTINS:
return self._eval_stmt(context, stmt, seek_name)
return set()
#@evaluator_function_cache(default=[])
@debug.increase_indent
def _eval_stmt(self, context, stmt, seek_name=None):
"""
The starting point of the completion. A statement always owns a call
list, which are the calls, that a statement does. In case multiple
names are defined in the statement, `seek_name` returns the result for
this name.
:param stmt: A `tree.ExprStmt`.
"""
debug.dbg('eval_statement %s (%s)', stmt, seek_name)
rhs = stmt.get_rhs()
types = self.eval_element(context, rhs)
if seek_name:
c_node = ContextualizedName(context, seek_name)
types = finder.check_tuple_assignments(self, c_node, types)
first_operator = next(stmt.yield_operators(), None)
if first_operator not in ('=', None) and first_operator.type == 'operator':
# `=` is always the last character in aug assignments -> -1
operator = copy.copy(first_operator)
operator.value = operator.value[:-1]
name = stmt.get_defined_names()[0].value
left = context.py__getattribute__(
name, position=stmt.start_pos, search_global=True)
for_stmt = tree.search_ancestor(stmt, 'for_stmt')
if for_stmt is not None and for_stmt.type == 'for_stmt' and types \
and parser_utils.for_stmt_defines_one_name(for_stmt):
# Iterate through result and add the values, that's possible
# only in for loops without clutter, because they are
# predictable. Also only do it, if the variable is not a tuple.
node = for_stmt.get_testlist()
cn = ContextualizedNode(context, node)
ordered = list(iterable.py__iter__(self, cn.infer(), cn))
for lazy_context in ordered:
dct = {for_stmt.children[1].value: lazy_context.infer()}
with helpers.predefine_names(context, for_stmt, dct):
t = self.eval_element(context, rhs)
left = precedence.calculate(self, context, left, operator, t)
types = left
else:
types = precedence.calculate(self, context, left, operator, types)
debug.dbg('eval_statement result %s', types)
return types
def eval_element(self, context, element):
if isinstance(context, iterable.CompForContext):
return self._eval_element_not_cached(context, element)
if_stmt = element
while if_stmt is not None:
if_stmt = if_stmt.parent
if if_stmt.type in ('if_stmt', 'for_stmt'):
break
if parser_utils.is_scope(if_stmt):
if_stmt = None
break
predefined_if_name_dict = context.predefined_names.get(if_stmt)
if predefined_if_name_dict is None and if_stmt and if_stmt.type == 'if_stmt':
if_stmt_test = if_stmt.children[1]
name_dicts = [{}]
# If we already did a check, we don't want to do it again -> If
# context.predefined_names is filled, we stop.
# We don't want to check the if stmt itself, it's just about
# the content.
if element.start_pos > if_stmt_test.end_pos:
# Now we need to check if the names in the if_stmt match the
# names in the suite.
if_names = helpers.get_names_of_node(if_stmt_test)
element_names = helpers.get_names_of_node(element)
str_element_names = [e.value for e in element_names]
if any(i.value in str_element_names for i in if_names):
for if_name in if_names:
definitions = self.goto_definitions(context, if_name)
# Every name that has multiple different definitions
# causes the complexity to rise. The complexity should
# never fall below 1.
if len(definitions) > 1:
if len(name_dicts) * len(definitions) > 16:
debug.dbg('Too many options for if branch evaluation %s.', if_stmt)
# There's only a certain amount of branches
# Jedi can evaluate, otherwise it will take to
# long.
name_dicts = [{}]
break
original_name_dicts = list(name_dicts)
name_dicts = []
for definition in definitions:
new_name_dicts = list(original_name_dicts)
for i, name_dict in enumerate(new_name_dicts):
new_name_dicts[i] = name_dict.copy()
new_name_dicts[i][if_name.value] = set([definition])
name_dicts += new_name_dicts
else:
for name_dict in name_dicts:
name_dict[if_name.value] = definitions
if len(name_dicts) > 1:
result = set()
for name_dict in name_dicts:
with helpers.predefine_names(context, if_stmt, name_dict):
result |= self._eval_element_not_cached(context, element)
return result
else:
return self._eval_element_if_evaluated(context, element)
else:
if predefined_if_name_dict:
return self._eval_element_not_cached(context, element)
else:
return self._eval_element_if_evaluated(context, element)
def _eval_element_if_evaluated(self, context, element):
"""
TODO This function is temporary: Merge with eval_element.
"""
parent = element
while parent is not None:
parent = parent.parent
predefined_if_name_dict = context.predefined_names.get(parent)
if predefined_if_name_dict is not None:
return self._eval_element_not_cached(context, element)
return self._eval_element_cached(context, element)
@evaluator_function_cache(default=set())
def _eval_element_cached(self, context, element):
return self._eval_element_not_cached(context, element)
@debug.increase_indent
@_limit_context_infers
def _eval_element_not_cached(self, context, element):
debug.dbg('eval_element %s@%s', element, element.start_pos)
types = set()
typ = element.type
if typ in ('name', 'number', 'string', 'atom'):
types = self.eval_atom(context, element)
elif typ == 'keyword':
# For False/True/None
if element.value in ('False', 'True', 'None'):
types.add(compiled.builtin_from_name(self, element.value))
# else: print e.g. could be evaluated like this in Python 2.7
elif typ == 'lambdef':
types = set([er.FunctionContext(self, context, element)])
elif typ == 'expr_stmt':
types = self.eval_statement(context, element)
elif typ in ('power', 'atom_expr'):
first_child = element.children[0]
if not (first_child.type == 'keyword' and first_child.value == 'await'):
types = self.eval_atom(context, first_child)
for trailer in element.children[1:]:
if trailer == '**': # has a power operation.
right = self.eval_element(context, element.children[2])
types = set(precedence.calculate(self, context, types, trailer, right))
break
types = self.eval_trailer(context, types, trailer)
elif typ in ('testlist_star_expr', 'testlist',):
# The implicit tuple in statements.
types = set([iterable.SequenceLiteralContext(self, context, element)])
elif typ in ('not_test', 'factor'):
types = self.eval_element(context, element.children[-1])
for operator in element.children[:-1]:
types = set(precedence.factor_calculate(self, types, operator))
elif typ == 'test':
# `x if foo else y` case.
types = (self.eval_element(context, element.children[0]) |
self.eval_element(context, element.children[-1]))
elif typ == 'operator':
# Must be an ellipsis, other operators are not evaluated.
# In Python 2 ellipsis is coded as three single dot tokens, not
# as one token 3 dot token.
assert element.value in ('.', '...')
types = set([compiled.create(self, Ellipsis)])
elif typ == 'dotted_name':
types = self.eval_atom(context, element.children[0])
for next_name in element.children[2::2]:
# TODO add search_global=True?
types = unite(
typ.py__getattribute__(next_name, name_context=context)
for typ in types
)
types = types
elif typ == 'eval_input':
types = self._eval_element_not_cached(context, element.children[0])
elif typ == 'annassign':
types = pep0484._evaluate_for_annotation(context, element.children[1])
else:
types = precedence.calculate_children(self, context, element.children)
debug.dbg('eval_element result %s', types)
return types
def eval_atom(self, context, atom):
"""
Basically to process ``atom`` nodes. The parser sometimes doesn't
generate the node (because it has just one child). In that case an atom
might be a name or a literal as well.
"""
if atom.type == 'name':
# This is the first global lookup.
stmt = tree.search_ancestor(
atom, 'expr_stmt', 'lambdef'
) or atom
if stmt.type == 'lambdef':
stmt = atom
return context.py__getattribute__(
name_or_str=atom,
position=stmt.start_pos,
search_global=True
)
elif isinstance(atom, tree.Literal):
string = parser_utils.safe_literal_eval(atom.value)
return set([compiled.create(self, string)])
else:
c = atom.children
if c[0].type == 'string':
# Will be one string.
types = self.eval_atom(context, c[0])
for string in c[1:]:
right = self.eval_atom(context, string)
types = precedence.calculate(self, context, types, '+', right)
return types
# Parentheses without commas are not tuples.
elif c[0] == '(' and not len(c) == 2 \
and not(c[1].type == 'testlist_comp' and
len(c[1].children) > 1):
return self.eval_element(context, c[1])
try:
comp_for = c[1].children[1]
except (IndexError, AttributeError):
pass
else:
if comp_for == ':':
# Dict comprehensions have a colon at the 3rd index.
try:
comp_for = c[1].children[3]
except IndexError:
pass
if comp_for.type == 'comp_for':
return set([iterable.Comprehension.from_atom(self, context, atom)])
# It's a dict/list/tuple literal.
array_node = c[1]
try:
array_node_c = array_node.children
except AttributeError:
array_node_c = []
if c[0] == '{' and (array_node == '}' or ':' in array_node_c):
context = iterable.DictLiteralContext(self, context, atom)
else:
context = iterable.SequenceLiteralContext(self, context, atom)
return set([context])
def eval_trailer(self, context, types, trailer):
trailer_op, node = trailer.children[:2]
if node == ')': # `arglist` is optional.
node = ()
new_types = set()
if trailer_op == '[':
new_types |= iterable.py__getitem__(self, context, types, trailer)
else:
for typ in types:
debug.dbg('eval_trailer: %s in scope %s', trailer, typ)
if trailer_op == '.':
new_types |= typ.py__getattribute__(
name_context=context,
name_or_str=node
)
elif trailer_op == '(':
arguments = param.TreeArguments(self, context, node, trailer)
new_types |= self.execute(typ, arguments)
return new_types
@debug.increase_indent
def execute(self, obj, arguments):
if self.is_analysis:
arguments.eval_all()
debug.dbg('execute: %s %s', obj, arguments)
try:
# Some stdlib functions like super(), namedtuple(), etc. have been
# hard-coded in Jedi to support them.
return stdlib.execute(self, obj, arguments)
except stdlib.NotInStdLib:
pass
try:
func = obj.py__call__
except AttributeError:
debug.warning("no execution possible %s", obj)
return set()
else:
types = func(arguments)
debug.dbg('execute result: %s in %s', types, obj)
return types
def goto_definitions(self, context, name):
def_ = name.get_definition(import_name_always=True)
if def_ is not None:
type_ = def_.type
if type_ == 'classdef':
return [er.ClassContext(self, name.parent, context)]
elif type_ == 'funcdef':
return [er.FunctionContext(self, context, name.parent)]
if type_ == 'expr_stmt':
is_simple_name = name.parent.type not in ('power', 'trailer')
if is_simple_name:
return self.eval_statement(context, def_, name)
if type_ == 'for_stmt':
container_types = self.eval_element(context, def_.children[3])
cn = ContextualizedNode(context, def_.children[3])
for_types = iterable.py__iter__types(self, container_types, cn)
c_node = ContextualizedName(context, name)
return finder.check_tuple_assignments(self, c_node, for_types)
if type_ in ('import_from', 'import_name'):
return imports.infer_import(context, name)
return helpers.evaluate_call_of_leaf(context, name)
def goto(self, context, name):
definition = name.get_definition(import_name_always=True)
if definition is not None:
type_ = definition.type
if type_ == 'expr_stmt':
# Only take the parent, because if it's more complicated than just
# a name it's something you can "goto" again.
is_simple_name = name.parent.type not in ('power', 'trailer')
if is_simple_name:
return [TreeNameDefinition(context, name)]
elif type_ == 'param':
return [ParamName(context, name)]
elif type_ in ('funcdef', 'classdef'):
return [TreeNameDefinition(context, name)]
elif type_ in ('import_from', 'import_name'):
module_names = imports.infer_import(context, name, is_goto=True)
return module_names
par = name.parent
typ = par.type
if typ == 'argument' and par.children[1] == '=' and par.children[0] == name:
# Named param goto.
trailer = par.parent
if trailer.type == 'arglist':
trailer = trailer.parent
if trailer.type != 'classdef':
if trailer.type == 'decorator':
types = self.eval_element(context, trailer.children[1])
else:
i = trailer.parent.children.index(trailer)
to_evaluate = trailer.parent.children[:i]
types = self.eval_element(context, to_evaluate[0])
for trailer in to_evaluate[1:]:
types = self.eval_trailer(context, types, trailer)
param_names = []
for typ in types:
try:
get_param_names = typ.get_param_names
except AttributeError:
pass
else:
for param_name in get_param_names():
if param_name.string_name == name.value:
param_names.append(param_name)
return param_names
elif typ == 'dotted_name': # Is a decorator.
index = par.children.index(name)
if index > 0:
new_dotted = helpers.deep_ast_copy(par)
new_dotted.children[index - 1:] = []
values = self.eval_element(context, new_dotted)
return unite(
value.py__getattribute__(name, name_context=context, is_goto=True)
for value in values
)
if typ == 'trailer' and par.children[0] == '.':
values = helpers.evaluate_call_of_leaf(context, name, cut_own_trailer=True)
return unite(
value.py__getattribute__(name, name_context=context, is_goto=True)
for value in values
)
else:
stmt = tree.search_ancestor(
name, 'expr_stmt', 'lambdef'
) or name
if stmt.type == 'lambdef':
stmt = name
return context.py__getattribute__(
name,
position=stmt.start_pos,
search_global=True, is_goto=True
)
def create_context(self, base_context, node, node_is_context=False, node_is_object=False):
def parent_scope(node):
while True:
node = node.parent
if parser_utils.is_scope(node):
return node
elif node.type in ('argument', 'testlist_comp'):
if node.children[1].type == 'comp_for':
return node.children[1]
elif node.type == 'dictorsetmaker':
for n in node.children[1:4]:
# In dictionaries it can be pretty much anything.
if n.type == 'comp_for':
return n
def from_scope_node(scope_node, child_is_funcdef=None, is_nested=True, node_is_object=False):
if scope_node == base_node:
return base_context
is_funcdef = scope_node.type in ('funcdef', 'lambdef')
parent_scope = parser_utils.get_parent_scope(scope_node)
parent_context = from_scope_node(parent_scope, child_is_funcdef=is_funcdef)
if is_funcdef:
if isinstance(parent_context, AnonymousInstance):
func = BoundMethod(
self, parent_context, parent_context.class_context,
parent_context.parent_context, scope_node
)
else:
func = er.FunctionContext(
self,
parent_context,
scope_node
)
if is_nested and not node_is_object:
return func.get_function_execution()
return func
elif scope_node.type == 'classdef':
class_context = er.ClassContext(self, scope_node, parent_context)
if child_is_funcdef:
# anonymous instance
return AnonymousInstance(self, parent_context, class_context)
else:
return class_context
elif scope_node.type == 'comp_for':
if node.start_pos >= scope_node.children[-1].start_pos:
return parent_context
return iterable.CompForContext.from_comp_for(parent_context, scope_node)
raise Exception("There's a scope that was not managed.")
base_node = base_context.tree_node
if node_is_context and parser_utils.is_scope(node):
scope_node = node
else:
if node.parent.type in ('funcdef', 'classdef') and node.parent.name == node:
# When we're on class/function names/leafs that define the
# object itself and not its contents.
node = node.parent
scope_node = parent_scope(node)
return from_scope_node(scope_node, is_nested=True, node_is_object=node_is_object)

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"""
Module for statical analysis.
"""
from jedi import debug
from parso.python import tree
from jedi.evaluate.compiled import CompiledObject
CODES = {
'attribute-error': (1, AttributeError, 'Potential AttributeError.'),
'name-error': (2, NameError, 'Potential NameError.'),
'import-error': (3, ImportError, 'Potential ImportError.'),
'type-error-too-many-arguments': (4, TypeError, None),
'type-error-too-few-arguments': (5, TypeError, None),
'type-error-keyword-argument': (6, TypeError, None),
'type-error-multiple-values': (7, TypeError, None),
'type-error-star-star': (8, TypeError, None),
'type-error-star': (9, TypeError, None),
'type-error-operation': (10, TypeError, None),
'type-error-not-iterable': (11, TypeError, None),
'type-error-isinstance': (12, TypeError, None),
'type-error-not-subscriptable': (13, TypeError, None),
'value-error-too-many-values': (14, ValueError, None),
'value-error-too-few-values': (15, ValueError, None),
}
class Error(object):
def __init__(self, name, module_path, start_pos, message=None):
self.path = module_path
self._start_pos = start_pos
self.name = name
if message is None:
message = CODES[self.name][2]
self.message = message
@property
def line(self):
return self._start_pos[0]
@property
def column(self):
return self._start_pos[1]
@property
def code(self):
# The class name start
first = self.__class__.__name__[0]
return first + str(CODES[self.name][0])
def __unicode__(self):
return '%s:%s:%s: %s %s' % (self.path, self.line, self.column,
self.code, self.message)
def __str__(self):
return self.__unicode__()
def __eq__(self, other):
return (self.path == other.path and self.name == other.name and
self._start_pos == other._start_pos)
def __ne__(self, other):
return not self.__eq__(other)
def __hash__(self):
return hash((self.path, self._start_pos, self.name))
def __repr__(self):
return '<%s %s: %s@%s,%s>' % (self.__class__.__name__,
self.name, self.path,
self._start_pos[0], self._start_pos[1])
class Warning(Error):
pass
def add(node_context, error_name, node, message=None, typ=Error, payload=None):
exception = CODES[error_name][1]
if _check_for_exception_catch(node_context, node, exception, payload):
return
# TODO this path is probably not right
module_context = node_context.get_root_context()
module_path = module_context.py__file__()
instance = typ(error_name, module_path, node.start_pos, message)
debug.warning(str(instance), format=False)
node_context.evaluator.analysis.append(instance)
def _check_for_setattr(instance):
"""
Check if there's any setattr method inside an instance. If so, return True.
"""
from jedi.evaluate.representation import ModuleContext
module = instance.get_root_context()
if not isinstance(module, ModuleContext):
return False
node = module.tree_node
try:
stmts = node.get_used_names()['setattr']
except KeyError:
return False
return any(node.start_pos < stmt.start_pos < node.end_pos
for stmt in stmts)
def add_attribute_error(name_context, lookup_context, name):
message = ('AttributeError: %s has no attribute %s.' % (lookup_context, name))
from jedi.evaluate.instance import AbstractInstanceContext, CompiledInstanceName
# Check for __getattr__/__getattribute__ existance and issue a warning
# instead of an error, if that happens.
typ = Error
if isinstance(lookup_context, AbstractInstanceContext):
slot_names = lookup_context.get_function_slot_names('__getattr__') + \
lookup_context.get_function_slot_names('__getattribute__')
for n in slot_names:
if isinstance(name, CompiledInstanceName) and \
n.parent_context.obj == object:
typ = Warning
break
if _check_for_setattr(lookup_context):
typ = Warning
payload = lookup_context, name
add(name_context, 'attribute-error', name, message, typ, payload)
def _check_for_exception_catch(node_context, jedi_name, exception, payload=None):
"""
Checks if a jedi object (e.g. `Statement`) sits inside a try/catch and
doesn't count as an error (if equal to `exception`).
Also checks `hasattr` for AttributeErrors and uses the `payload` to compare
it.
Returns True if the exception was catched.
"""
def check_match(cls, exception):
try:
return isinstance(cls, CompiledObject) and issubclass(exception, cls.obj)
except TypeError:
return False
def check_try_for_except(obj, exception):
# Only nodes in try
iterator = iter(obj.children)
for branch_type in iterator:
colon = next(iterator)
suite = next(iterator)
if branch_type == 'try' \
and not (branch_type.start_pos < jedi_name.start_pos <= suite.end_pos):
return False
for node in obj.get_except_clause_tests():
if node is None:
return True # An exception block that catches everything.
else:
except_classes = node_context.eval_node(node)
for cls in except_classes:
from jedi.evaluate import iterable
if isinstance(cls, iterable.AbstractSequence) and \
cls.array_type == 'tuple':
# multiple exceptions
for lazy_context in cls.py__iter__():
for typ in lazy_context.infer():
if check_match(typ, exception):
return True
else:
if check_match(cls, exception):
return True
def check_hasattr(node, suite):
try:
assert suite.start_pos <= jedi_name.start_pos < suite.end_pos
assert node.type in ('power', 'atom_expr')
base = node.children[0]
assert base.type == 'name' and base.value == 'hasattr'
trailer = node.children[1]
assert trailer.type == 'trailer'
arglist = trailer.children[1]
assert arglist.type == 'arglist'
from jedi.evaluate.param import TreeArguments
args = list(TreeArguments(node_context.evaluator, node_context, arglist).unpack())
# Arguments should be very simple
assert len(args) == 2
# Check name
key, lazy_context = args[1]
names = list(lazy_context.infer())
assert len(names) == 1 and isinstance(names[0], CompiledObject)
assert names[0].obj == payload[1].value
# Check objects
key, lazy_context = args[0]
objects = lazy_context.infer()
return payload[0] in objects
except AssertionError:
return False
obj = jedi_name
while obj is not None and not isinstance(obj, (tree.Function, tree.Class)):
if isinstance(obj, tree.Flow):
# try/except catch check
if obj.type == 'try_stmt' and check_try_for_except(obj, exception):
return True
# hasattr check
if exception == AttributeError and obj.type in ('if_stmt', 'while_stmt'):
if check_hasattr(obj.children[1], obj.children[3]):
return True
obj = obj.parent
return False

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"""
- the popular ``_memoize_default`` works like a typical memoize and returns the
default otherwise.
- ``CachedMetaClass`` uses ``_memoize_default`` to do the same with classes.
"""
import inspect
_NO_DEFAULT = object()
def _memoize_default(default=_NO_DEFAULT, evaluator_is_first_arg=False, second_arg_is_evaluator=False):
""" This is a typical memoization decorator, BUT there is one difference:
To prevent recursion it sets defaults.
Preventing recursion is in this case the much bigger use than speed. I
don't think, that there is a big speed difference, but there are many cases
where recursion could happen (think about a = b; b = a).
"""
def func(function):
def wrapper(obj, *args, **kwargs):
# TODO These checks are kind of ugly and slow.
if evaluator_is_first_arg:
cache = obj.memoize_cache
elif second_arg_is_evaluator:
cache = args[0].memoize_cache # needed for meta classes
else:
cache = obj.evaluator.memoize_cache
try:
memo = cache[function]
except KeyError:
memo = {}
cache[function] = memo
key = (obj, args, frozenset(kwargs.items()))
if key in memo:
return memo[key]
else:
if default is not _NO_DEFAULT:
memo[key] = default
rv = function(obj, *args, **kwargs)
if inspect.isgenerator(rv):
rv = list(rv)
memo[key] = rv
return rv
return wrapper
return func
def evaluator_function_cache(default=_NO_DEFAULT):
def decorator(func):
return _memoize_default(default=default, evaluator_is_first_arg=True)(func)
return decorator
def evaluator_method_cache(default=_NO_DEFAULT):
def decorator(func):
return _memoize_default(default=default)(func)
return decorator
def _memoize_meta_class():
def decorator(call):
return _memoize_default(second_arg_is_evaluator=True)(call)
return decorator
class CachedMetaClass(type):
"""
This is basically almost the same than the decorator above, it just caches
class initializations. Either you do it this way or with decorators, but
with decorators you lose class access (isinstance, etc).
"""
@_memoize_meta_class()
def __call__(self, *args, **kwargs):
return super(CachedMetaClass, self).__call__(*args, **kwargs)

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"""
Imitate the parser representation.
"""
import inspect
import re
import sys
import os
import types
from functools import partial
from jedi._compatibility import builtins as _builtins, unicode, py_version
from jedi import debug
from jedi.cache import underscore_memoization, memoize_method
from jedi.evaluate.filters import AbstractFilter, AbstractNameDefinition, \
ContextNameMixin
from jedi.evaluate.context import Context, LazyKnownContext
from jedi.evaluate.compiled.getattr_static import getattr_static
from . import fake
_sep = os.path.sep
if os.path.altsep is not None:
_sep += os.path.altsep
_path_re = re.compile('(?:\.[^{0}]+|[{0}]__init__\.py)$'.format(re.escape(_sep)))
del _sep
# Those types don't exist in typing.
MethodDescriptorType = type(str.replace)
WrapperDescriptorType = type(set.__iter__)
# `object.__subclasshook__` is an already executed descriptor.
object_class_dict = type.__dict__["__dict__"].__get__(object)
ClassMethodDescriptorType = type(object_class_dict['__subclasshook__'])
ALLOWED_DESCRIPTOR_ACCESS = (
types.FunctionType,
types.GetSetDescriptorType,
types.MemberDescriptorType,
MethodDescriptorType,
WrapperDescriptorType,
ClassMethodDescriptorType,
staticmethod,
classmethod,
)
class CheckAttribute(object):
"""Raises an AttributeError if the attribute X isn't available."""
def __init__(self, func):
self.func = func
# Remove the py in front of e.g. py__call__.
self.check_name = func.__name__[2:]
def __get__(self, instance, owner):
# This might raise an AttributeError. That's wanted.
if self.check_name == '__iter__':
# Python iterators are a bit strange, because there's no need for
# the __iter__ function as long as __getitem__ is defined (it will
# just start with __getitem__(0). This is especially true for
# Python 2 strings, where `str.__iter__` is not even defined.
try:
iter(instance.obj)
except TypeError:
raise AttributeError
else:
getattr(instance.obj, self.check_name)
return partial(self.func, instance)
class CompiledObject(Context):
path = None # modules have this attribute - set it to None.
used_names = lambda self: {} # To be consistent with modules.
def __init__(self, evaluator, obj, parent_context=None, faked_class=None):
super(CompiledObject, self).__init__(evaluator, parent_context)
self.obj = obj
# This attribute will not be set for most classes, except for fakes.
self.tree_node = faked_class
def get_root_node(self):
# To make things a bit easier with filters we add this method here.
return self.get_root_context()
@CheckAttribute
def py__call__(self, params):
if inspect.isclass(self.obj):
from jedi.evaluate.instance import CompiledInstance
return set([CompiledInstance(self.evaluator, self.parent_context, self, params)])
else:
return set(self._execute_function(params))
@CheckAttribute
def py__class__(self):
return create(self.evaluator, self.obj.__class__)
@CheckAttribute
def py__mro__(self):
return (self,) + tuple(create(self.evaluator, cls) for cls in self.obj.__mro__[1:])
@CheckAttribute
def py__bases__(self):
return tuple(create(self.evaluator, cls) for cls in self.obj.__bases__)
def py__bool__(self):
return bool(self.obj)
def py__file__(self):
try:
return self.obj.__file__
except AttributeError:
return None
def is_class(self):
return inspect.isclass(self.obj)
def py__doc__(self, include_call_signature=False):
return inspect.getdoc(self.obj) or ''
def get_param_names(self):
obj = self.obj
try:
if py_version < 33:
raise ValueError("inspect.signature was introduced in 3.3")
if py_version == 34:
# In 3.4 inspect.signature are wrong for str and int. This has
# been fixed in 3.5. The signature of object is returned,
# because no signature was found for str. Here we imitate 3.5
# logic and just ignore the signature if the magic methods
# don't match object.
# 3.3 doesn't even have the logic and returns nothing for str
# and classes that inherit from object.
user_def = inspect._signature_get_user_defined_method
if (inspect.isclass(obj)
and not user_def(type(obj), '__init__')
and not user_def(type(obj), '__new__')
and (obj.__init__ != object.__init__
or obj.__new__ != object.__new__)):
raise ValueError
signature = inspect.signature(obj)
except ValueError: # Has no signature
params_str, ret = self._parse_function_doc()
tokens = params_str.split(',')
if inspect.ismethoddescriptor(obj):
tokens.insert(0, 'self')
for p in tokens:
parts = p.strip().split('=')
yield UnresolvableParamName(self, parts[0])
else:
for signature_param in signature.parameters.values():
yield SignatureParamName(self, signature_param)
def __repr__(self):
return '<%s: %s>' % (self.__class__.__name__, repr(self.obj))
@underscore_memoization
def _parse_function_doc(self):
doc = self.py__doc__()
if doc is None:
return '', ''
return _parse_function_doc(doc)
@property
def api_type(self):
obj = self.obj
if inspect.isclass(obj):
return 'class'
elif inspect.ismodule(obj):
return 'module'
elif inspect.isbuiltin(obj) or inspect.ismethod(obj) \
or inspect.ismethoddescriptor(obj) or inspect.isfunction(obj):
return 'function'
# Everything else...
return 'instance'
@property
def type(self):
"""Imitate the tree.Node.type values."""
cls = self._get_class()
if inspect.isclass(cls):
return 'classdef'
elif inspect.ismodule(cls):
return 'file_input'
elif inspect.isbuiltin(cls) or inspect.ismethod(cls) or \
inspect.ismethoddescriptor(cls):
return 'funcdef'
@underscore_memoization
def _cls(self):
"""
We used to limit the lookups for instantiated objects like list(), but
this is not the case anymore. Python itself
"""
# Ensures that a CompiledObject is returned that is not an instance (like list)
return self
def _get_class(self):
if not fake.is_class_instance(self.obj) or \
inspect.ismethoddescriptor(self.obj): # slots
return self.obj
try:
return self.obj.__class__
except AttributeError:
# happens with numpy.core.umath._UFUNC_API (you get it
# automatically by doing `import numpy`.
return type
def get_filters(self, search_global=False, is_instance=False,
until_position=None, origin_scope=None):
yield self._ensure_one_filter(is_instance)
@memoize_method
def _ensure_one_filter(self, is_instance):
"""
search_global shouldn't change the fact that there's one dict, this way
there's only one `object`.
"""
return CompiledObjectFilter(self.evaluator, self, is_instance)
@CheckAttribute
def py__getitem__(self, index):
if type(self.obj) not in (str, list, tuple, unicode, bytes, bytearray, dict):
# Get rid of side effects, we won't call custom `__getitem__`s.
return set()
return set([create(self.evaluator, self.obj[index])])
@CheckAttribute
def py__iter__(self):
if type(self.obj) not in (str, list, tuple, unicode, bytes, bytearray, dict):
# Get rid of side effects, we won't call custom `__getitem__`s.
return
for i, part in enumerate(self.obj):
if i > 20:
# Should not go crazy with large iterators
break
yield LazyKnownContext(create(self.evaluator, part))
def py__name__(self):
try:
return self._get_class().__name__
except AttributeError:
return None
@property
def name(self):
try:
name = self._get_class().__name__
except AttributeError:
name = repr(self.obj)
return CompiledContextName(self, name)
def _execute_function(self, params):
from jedi.evaluate import docstrings
if self.type != 'funcdef':
return
for name in self._parse_function_doc()[1].split():
try:
bltn_obj = getattr(_builtins, name)
except AttributeError:
continue
else:
if bltn_obj is None:
# We want to evaluate everything except None.
# TODO do we?
continue
bltn_obj = create(self.evaluator, bltn_obj)
for result in self.evaluator.execute(bltn_obj, params):
yield result
for type_ in docstrings.infer_return_types(self):
yield type_
def get_self_attributes(self):
return [] # Instance compatibility
def get_imports(self):
return [] # Builtins don't have imports
def dict_values(self):
return set(create(self.evaluator, v) for v in self.obj.values())
class CompiledName(AbstractNameDefinition):
def __init__(self, evaluator, parent_context, name):
self._evaluator = evaluator
self.parent_context = parent_context
self.string_name = name
def __repr__(self):
try:
name = self.parent_context.name # __name__ is not defined all the time
except AttributeError:
name = None
return '<%s: (%s).%s>' % (self.__class__.__name__, name, self.string_name)
@property
def api_type(self):
return next(iter(self.infer())).api_type
@underscore_memoization
def infer(self):
module = self.parent_context.get_root_context()
return [_create_from_name(self._evaluator, module, self.parent_context, self.string_name)]
class SignatureParamName(AbstractNameDefinition):
api_type = 'param'
def __init__(self, compiled_obj, signature_param):
self.parent_context = compiled_obj.parent_context
self._signature_param = signature_param
@property
def string_name(self):
return self._signature_param.name
def infer(self):
p = self._signature_param
evaluator = self.parent_context.evaluator
types = set()
if p.default is not p.empty:
types.add(create(evaluator, p.default))
if p.annotation is not p.empty:
annotation = create(evaluator, p.annotation)
types |= annotation.execute_evaluated()
return types
class UnresolvableParamName(AbstractNameDefinition):
api_type = 'param'
def __init__(self, compiled_obj, name):
self.parent_context = compiled_obj.parent_context
self.string_name = name
def infer(self):
return set()
class CompiledContextName(ContextNameMixin, AbstractNameDefinition):
def __init__(self, context, name):
self.string_name = name
self._context = context
self.parent_context = context.parent_context
class EmptyCompiledName(AbstractNameDefinition):
"""
Accessing some names will raise an exception. To avoid not having any
completions, just give Jedi the option to return this object. It infers to
nothing.
"""
def __init__(self, evaluator, name):
self.parent_context = evaluator.BUILTINS
self.string_name = name
def infer(self):
return []
class CompiledObjectFilter(AbstractFilter):
name_class = CompiledName
def __init__(self, evaluator, compiled_object, is_instance=False):
self._evaluator = evaluator
self._compiled_object = compiled_object
self._is_instance = is_instance
@memoize_method
def get(self, name):
name = str(name)
obj = self._compiled_object.obj
try:
attr, is_get_descriptor = getattr_static(obj, name)
except AttributeError:
return []
else:
if is_get_descriptor \
and not type(attr) in ALLOWED_DESCRIPTOR_ACCESS:
# In case of descriptors that have get methods we cannot return
# it's value, because that would mean code execution.
return [EmptyCompiledName(self._evaluator, name)]
if self._is_instance and name not in dir(obj):
return []
return [self._create_name(name)]
def values(self):
obj = self._compiled_object.obj
names = []
for name in dir(obj):
names += self.get(name)
is_instance = self._is_instance or fake.is_class_instance(obj)
# ``dir`` doesn't include the type names.
if not inspect.ismodule(obj) and (obj is not type) and not is_instance:
for filter in create(self._evaluator, type).get_filters():
names += filter.values()
return names
def _create_name(self, name):
return self.name_class(self._evaluator, self._compiled_object, name)
def dotted_from_fs_path(fs_path, sys_path):
"""
Changes `/usr/lib/python3.4/email/utils.py` to `email.utils`. I.e.
compares the path with sys.path and then returns the dotted_path. If the
path is not in the sys.path, just returns None.
"""
if os.path.basename(fs_path).startswith('__init__.'):
# We are calculating the path. __init__ files are not interesting.
fs_path = os.path.dirname(fs_path)
# prefer
# - UNIX
# /path/to/pythonX.Y/lib-dynload
# /path/to/pythonX.Y/site-packages
# - Windows
# C:\path\to\DLLs
# C:\path\to\Lib\site-packages
# over
# - UNIX
# /path/to/pythonX.Y
# - Windows
# C:\path\to\Lib
path = ''
for s in sys_path:
if (fs_path.startswith(s) and len(path) < len(s)):
path = s
# - Window
# X:\path\to\lib-dynload/datetime.pyd => datetime
module_path = fs_path[len(path):].lstrip(os.path.sep).lstrip('/')
# - Window
# Replace like X:\path\to\something/foo/bar.py
return _path_re.sub('', module_path).replace(os.path.sep, '.').replace('/', '.')
def load_module(evaluator, path=None, name=None):
sys_path = evaluator.sys_path
if path is not None:
dotted_path = dotted_from_fs_path(path, sys_path=sys_path)
else:
dotted_path = name
if dotted_path is None:
p, _, dotted_path = path.partition(os.path.sep)
sys_path.insert(0, p)
temp, sys.path = sys.path, sys_path
try:
__import__(dotted_path)
except RuntimeError:
if 'PySide' in dotted_path or 'PyQt' in dotted_path:
# RuntimeError: the PyQt4.QtCore and PyQt5.QtCore modules both wrap
# the QObject class.
# See https://github.com/davidhalter/jedi/pull/483
return None
raise
except ImportError:
# If a module is "corrupt" or not really a Python module or whatever.
debug.warning('Module %s not importable in path %s.', dotted_path, path)
return None
finally:
sys.path = temp
# Just access the cache after import, because of #59 as well as the very
# complicated import structure of Python.
module = sys.modules[dotted_path]
return create(evaluator, module)
docstr_defaults = {
'floating point number': 'float',
'character': 'str',
'integer': 'int',
'dictionary': 'dict',
'string': 'str',
}
def _parse_function_doc(doc):
"""
Takes a function and returns the params and return value as a tuple.
This is nothing more than a docstring parser.
TODO docstrings like utime(path, (atime, mtime)) and a(b [, b]) -> None
TODO docstrings like 'tuple of integers'
"""
# parse round parentheses: def func(a, (b,c))
try:
count = 0
start = doc.index('(')
for i, s in enumerate(doc[start:]):
if s == '(':
count += 1
elif s == ')':
count -= 1
if count == 0:
end = start + i
break
param_str = doc[start + 1:end]
except (ValueError, UnboundLocalError):
# ValueError for doc.index
# UnboundLocalError for undefined end in last line
debug.dbg('no brackets found - no param')
end = 0
param_str = ''
else:
# remove square brackets, that show an optional param ( = None)
def change_options(m):
args = m.group(1).split(',')
for i, a in enumerate(args):
if a and '=' not in a:
args[i] += '=None'
return ','.join(args)
while True:
param_str, changes = re.subn(r' ?\[([^\[\]]+)\]',
change_options, param_str)
if changes == 0:
break
param_str = param_str.replace('-', '_') # see: isinstance.__doc__
# parse return value
r = re.search('-[>-]* ', doc[end:end + 7])
if r is None:
ret = ''
else:
index = end + r.end()
# get result type, which can contain newlines
pattern = re.compile(r'(,\n|[^\n-])+')
ret_str = pattern.match(doc, index).group(0).strip()
# New object -> object()
ret_str = re.sub(r'[nN]ew (.*)', r'\1()', ret_str)
ret = docstr_defaults.get(ret_str, ret_str)
return param_str, ret
def _create_from_name(evaluator, module, compiled_object, name):
obj = compiled_object.obj
faked = None
try:
faked = fake.get_faked(evaluator, module, obj, parent_context=compiled_object, name=name)
if faked.type == 'funcdef':
from jedi.evaluate.representation import FunctionContext
return FunctionContext(evaluator, compiled_object, faked)
except fake.FakeDoesNotExist:
pass
try:
obj = getattr(obj, name)
except AttributeError:
# Happens e.g. in properties of
# PyQt4.QtGui.QStyleOptionComboBox.currentText
# -> just set it to None
obj = None
return create(evaluator, obj, parent_context=compiled_object, faked=faked)
def builtin_from_name(evaluator, string):
bltn_obj = getattr(_builtins, string)
return create(evaluator, bltn_obj)
def _a_generator(foo):
"""Used to have an object to return for generators."""
yield 42
yield foo
_SPECIAL_OBJECTS = {
'FUNCTION_CLASS': type(load_module),
'METHOD_CLASS': type(CompiledObject.is_class),
'MODULE_CLASS': type(os),
'GENERATOR_OBJECT': _a_generator(1.0),
'BUILTINS': _builtins,
}
def get_special_object(evaluator, identifier):
obj = _SPECIAL_OBJECTS[identifier]
return create(evaluator, obj, parent_context=create(evaluator, _builtins))
def compiled_objects_cache(attribute_name):
def decorator(func):
"""
This decorator caches just the ids, oopposed to caching the object itself.
Caching the id has the advantage that an object doesn't need to be
hashable.
"""
def wrapper(evaluator, obj, parent_context=None, module=None, faked=None):
cache = getattr(evaluator, attribute_name)
# Do a very cheap form of caching here.
key = id(obj), id(parent_context)
try:
return cache[key][0]
except KeyError:
# TODO this whole decorator is way too ugly
result = func(evaluator, obj, parent_context, module, faked)
# Need to cache all of them, otherwise the id could be overwritten.
cache[key] = result, obj, parent_context, module, faked
return result
return wrapper
return decorator
@compiled_objects_cache('compiled_cache')
def create(evaluator, obj, parent_context=None, module=None, faked=None):
"""
A very weird interface class to this module. The more options provided the
more acurate loading compiled objects is.
"""
if inspect.ismodule(obj):
if parent_context is not None:
# Modules don't have parents, be careful with caching: recurse.
return create(evaluator, obj)
else:
if parent_context is None and obj is not _builtins:
return create(evaluator, obj, create(evaluator, _builtins))
try:
faked = fake.get_faked(evaluator, module, obj, parent_context=parent_context)
if faked.type == 'funcdef':
from jedi.evaluate.representation import FunctionContext
return FunctionContext(evaluator, parent_context, faked)
except fake.FakeDoesNotExist:
pass
return CompiledObject(evaluator, obj, parent_context, faked)

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"""
Loads functions that are mixed in to the standard library. E.g. builtins are
written in C (binaries), but my autocompletion only understands Python code. By
mixing in Python code, the autocompletion should work much better for builtins.
"""
import os
import inspect
import types
from itertools import chain
from parso.python import tree
from jedi._compatibility import is_py3, builtins, unicode, is_py34
modules = {}
MethodDescriptorType = type(str.replace)
# These are not considered classes and access is granted even though they have
# a __class__ attribute.
NOT_CLASS_TYPES = (
types.BuiltinFunctionType,
types.CodeType,
types.FrameType,
types.FunctionType,
types.GeneratorType,
types.GetSetDescriptorType,
types.LambdaType,
types.MemberDescriptorType,
types.MethodType,
types.ModuleType,
types.TracebackType,
MethodDescriptorType
)
if is_py3:
NOT_CLASS_TYPES += (
types.MappingProxyType,
types.SimpleNamespace
)
if is_py34:
NOT_CLASS_TYPES += (types.DynamicClassAttribute,)
class FakeDoesNotExist(Exception):
pass
def _load_faked_module(grammar, module):
module_name = module.__name__
if module_name == '__builtin__' and not is_py3:
module_name = 'builtins'
try:
return modules[module_name]
except KeyError:
path = os.path.dirname(os.path.abspath(__file__))
try:
with open(os.path.join(path, 'fake', module_name) + '.pym') as f:
source = f.read()
except IOError:
modules[module_name] = None
return
modules[module_name] = m = grammar.parse(unicode(source))
if module_name == 'builtins' and not is_py3:
# There are two implementations of `open` for either python 2/3.
# -> Rename the python2 version (`look at fake/builtins.pym`).
open_func = _search_scope(m, 'open')
open_func.children[1].value = 'open_python3'
open_func = _search_scope(m, 'open_python2')
open_func.children[1].value = 'open'
return m
def _search_scope(scope, obj_name):
for s in chain(scope.iter_classdefs(), scope.iter_funcdefs()):
if s.name.value == obj_name:
return s
def get_module(obj):
if inspect.ismodule(obj):
return obj
try:
obj = obj.__objclass__
except AttributeError:
pass
try:
imp_plz = obj.__module__
except AttributeError:
# Unfortunately in some cases like `int` there's no __module__
return builtins
else:
if imp_plz is None:
# Happens for example in `(_ for _ in []).send.__module__`.
return builtins
else:
try:
return __import__(imp_plz)
except ImportError:
# __module__ can be something arbitrary that doesn't exist.
return builtins
def _faked(grammar, module, obj, name):
# Crazy underscore actions to try to escape all the internal madness.
if module is None:
module = get_module(obj)
faked_mod = _load_faked_module(grammar, module)
if faked_mod is None:
return None, None
# Having the module as a `parser.python.tree.Module`, we need to scan
# for methods.
if name is None:
if inspect.isbuiltin(obj) or inspect.isclass(obj):
return _search_scope(faked_mod, obj.__name__), faked_mod
elif not inspect.isclass(obj):
# object is a method or descriptor
try:
objclass = obj.__objclass__
except AttributeError:
return None, None
else:
cls = _search_scope(faked_mod, objclass.__name__)
if cls is None:
return None, None
return _search_scope(cls, obj.__name__), faked_mod
else:
if obj is module:
return _search_scope(faked_mod, name), faked_mod
else:
try:
cls_name = obj.__name__
except AttributeError:
return None, None
cls = _search_scope(faked_mod, cls_name)
if cls is None:
return None, None
return _search_scope(cls, name), faked_mod
return None, None
def memoize_faked(obj):
"""
A typical memoize function that ignores issues with non hashable results.
"""
cache = obj.cache = {}
def memoizer(*args, **kwargs):
key = (obj, args, frozenset(kwargs.items()))
try:
result = cache[key]
except (TypeError, ValueError):
return obj(*args, **kwargs)
except KeyError:
result = obj(*args, **kwargs)
if result is not None:
cache[key] = obj(*args, **kwargs)
return result
else:
return result
return memoizer
@memoize_faked
def _get_faked(grammar, module, obj, name=None):
result, fake_module = _faked(grammar, module, obj, name)
if result is None:
# We're not interested in classes. What we want is functions.
raise FakeDoesNotExist
elif result.type == 'classdef':
return result, fake_module
else:
# Set the docstr which was previously not set (faked modules don't
# contain it).
assert result.type == 'funcdef'
doc = '"""%s"""' % obj.__doc__ # TODO need escapes.
suite = result.children[-1]
string = tree.String(doc, (0, 0), '')
new_line = tree.Newline('\n', (0, 0))
docstr_node = tree.PythonNode('simple_stmt', [string, new_line])
suite.children.insert(1, docstr_node)
return result, fake_module
def get_faked(evaluator, module, obj, name=None, parent_context=None):
if parent_context and parent_context.tree_node is not None:
# Try to search in already clearly defined stuff.
found = _search_scope(parent_context.tree_node, name)
if found is not None:
return found
else:
raise FakeDoesNotExist
faked, fake_module = _get_faked(evaluator.latest_grammar, module and module.obj, obj, name)
if module is not None:
module.get_used_names = fake_module.get_used_names
return faked
def is_class_instance(obj):
"""Like inspect.* methods."""
try:
cls = obj.__class__
except AttributeError:
return False
else:
return cls != type and not issubclass(cls, NOT_CLASS_TYPES)

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class partial():
def __init__(self, func, *args, **keywords):
self.__func = func
self.__args = args
self.__keywords = keywords
def __call__(self, *args, **kwargs):
# TODO should be **dict(self.__keywords, **kwargs)
return self.__func(*(self.__args + args), **self.__keywords)

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def connect(database, timeout=None, isolation_level=None, detect_types=None, factory=None):
return Connection()
class Connection():
def cursor(self):
return Cursor()
class Cursor():
def cursor(self):
return Cursor()
def fetchone(self):
return Row()
def fetchmany(self, size=cursor.arraysize):
return [self.fetchone()]
def fetchall(self):
return [self.fetchone()]
class Row():
def keys(self):
return ['']

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def compile():
class SRE_Match():
endpos = int()
lastgroup = int()
lastindex = int()
pos = int()
string = str()
regs = ((int(), int()),)
def __init__(self, pattern):
self.re = pattern
def start(self):
return int()
def end(self):
return int()
def span(self):
return int(), int()
def expand(self):
return str()
def group(self, nr):
return str()
def groupdict(self):
return {str(): str()}
def groups(self):
return (str(),)
class SRE_Pattern():
flags = int()
groupindex = {}
groups = int()
pattern = str()
def findall(self, string, pos=None, endpos=None):
"""
findall(string[, pos[, endpos]]) --> list.
Return a list of all non-overlapping matches of pattern in string.
"""
return [str()]
def finditer(self, string, pos=None, endpos=None):
"""
finditer(string[, pos[, endpos]]) --> iterator.
Return an iterator over all non-overlapping matches for the
RE pattern in string. For each match, the iterator returns a
match object.
"""
yield SRE_Match(self)
def match(self, string, pos=None, endpos=None):
"""
match(string[, pos[, endpos]]) --> match object or None.
Matches zero or more characters at the beginning of the string
pattern
"""
return SRE_Match(self)
def scanner(self, string, pos=None, endpos=None):
pass
def search(self, string, pos=None, endpos=None):
"""
search(string[, pos[, endpos]]) --> match object or None.
Scan through string looking for a match, and return a corresponding
MatchObject instance. Return None if no position in the string matches.
"""
return SRE_Match(self)
def split(self, string, maxsplit=0]):
"""
split(string[, maxsplit = 0]) --> list.
Split string by the occurrences of pattern.
"""
return [str()]
def sub(self, repl, string, count=0):
"""
sub(repl, string[, count = 0]) --> newstring
Return the string obtained by replacing the leftmost non-overlapping
occurrences of pattern in string by the replacement repl.
"""
return str()
def subn(self, repl, string, count=0):
"""
subn(repl, string[, count = 0]) --> (newstring, number of subs)
Return the tuple (new_string, number_of_subs_made) found by replacing
the leftmost non-overlapping occurrences of pattern with the
replacement repl.
"""
return (str(), int())
return SRE_Pattern()

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def proxy(object, callback=None):
return object
class ref():
def __init__(self, object, callback=None):
self.__object = object
def __call__(self):
return self.__object

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"""
Pure Python implementation of some builtins.
This code is not going to be executed anywhere.
These implementations are not always correct, but should work as good as
possible for the auto completion.
"""
def next(iterator, default=None):
if random.choice([0, 1]):
if hasattr("next"):
return iterator.next()
else:
return iterator.__next__()
else:
if default is not None:
return default
def iter(collection, sentinel=None):
if sentinel:
yield collection()
else:
for c in collection:
yield c
def range(start, stop=None, step=1):
return [0]
class file():
def __iter__(self):
yield ''
def next(self):
return ''
def readlines(self):
return ['']
def __enter__(self):
return self
class xrange():
# Attention: this function doesn't exist in Py3k (there it is range).
def __iter__(self):
yield 1
def count(self):
return 1
def index(self):
return 1
def open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None, closefd=True):
import io
return io.TextIOWrapper(file, mode, buffering, encoding, errors, newline, closefd)
def open_python2(name, mode=None, buffering=None):
return file(name, mode, buffering)
#--------------------------------------------------------
# descriptors
#--------------------------------------------------------
class property():
def __init__(self, fget, fset=None, fdel=None, doc=None):
self.fget = fget
self.fset = fset
self.fdel = fdel
self.__doc__ = doc
def __get__(self, obj, cls):
return self.fget(obj)
def __set__(self, obj, value):
self.fset(obj, value)
def __delete__(self, obj):
self.fdel(obj)
def setter(self, func):
self.fset = func
return self
def getter(self, func):
self.fget = func
return self
def deleter(self, func):
self.fdel = func
return self
class staticmethod():
def __init__(self, func):
self.__func = func
def __get__(self, obj, cls):
return self.__func
class classmethod():
def __init__(self, func):
self.__func = func
def __get__(self, obj, cls):
def _method(*args, **kwargs):
return self.__func(cls, *args, **kwargs)
return _method
#--------------------------------------------------------
# array stuff
#--------------------------------------------------------
class list():
def __init__(self, iterable=[]):
self.__iterable = []
for i in iterable:
self.__iterable += [i]
def __iter__(self):
for i in self.__iterable:
yield i
def __getitem__(self, y):
return self.__iterable[y]
def pop(self):
return self.__iterable[int()]
class tuple():
def __init__(self, iterable=[]):
self.__iterable = []
for i in iterable:
self.__iterable += [i]
def __iter__(self):
for i in self.__iterable:
yield i
def __getitem__(self, y):
return self.__iterable[y]
def index(self):
return 1
def count(self):
return 1
class set():
def __init__(self, iterable=[]):
self.__iterable = iterable
def __iter__(self):
for i in self.__iterable:
yield i
def pop(self):
return list(self.__iterable)[-1]
def copy(self):
return self
def difference(self, other):
return self - other
def intersection(self, other):
return self & other
def symmetric_difference(self, other):
return self ^ other
def union(self, other):
return self | other
class frozenset():
def __init__(self, iterable=[]):
self.__iterable = iterable
def __iter__(self):
for i in self.__iterable:
yield i
def copy(self):
return self
class dict():
def __init__(self, **elements):
self.__elements = elements
def clear(self):
# has a strange docstr
pass
def get(self, k, d=None):
# TODO implement
try:
#return self.__elements[k]
pass
except KeyError:
return d
def values(self):
return self.__elements.values()
def setdefault(self, k, d):
# TODO maybe also return the content
return d
class enumerate():
def __init__(self, sequence, start=0):
self.__sequence = sequence
def __iter__(self):
for i in self.__sequence:
yield 1, i
def __next__(self):
return next(self.__iter__())
def next(self):
return next(self.__iter__())
class reversed():
def __init__(self, sequence):
self.__sequence = sequence
def __iter__(self):
for i in self.__sequence:
yield i
def __next__(self):
return next(self.__iter__())
def next(self):
return next(self.__iter__())
def sorted(iterable, cmp=None, key=None, reverse=False):
return iterable
#--------------------------------------------------------
# basic types
#--------------------------------------------------------
class int():
def __init__(self, x, base=None):
pass
class str():
def __init__(self, obj):
pass
def strip(self):
return str()
def split(self):
return [str()]
class type():
def mro():
return [object]

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class datetime():
@staticmethod
def now():
return datetime()

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class TextIOWrapper():
def __next__(self):
return str()
def __iter__(self):
yield str()
def readlines(self):
return ['']
def __enter__(self):
return self

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# Just copied this code from Python 3.6.
class itemgetter:
"""
Return a callable object that fetches the given item(s) from its operand.
After f = itemgetter(2), the call f(r) returns r[2].
After g = itemgetter(2, 5, 3), the call g(r) returns (r[2], r[5], r[3])
"""
__slots__ = ('_items', '_call')
def __init__(self, item, *items):
if not items:
self._items = (item,)
def func(obj):
return obj[item]
self._call = func
else:
self._items = items = (item,) + items
def func(obj):
return tuple(obj[i] for i in items)
self._call = func
def __call__(self, obj):
return self._call(obj)
def __repr__(self):
return '%s.%s(%s)' % (self.__class__.__module__,
self.__class__.__name__,
', '.join(map(repr, self._items)))
def __reduce__(self):
return self.__class__, self._items

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def getcwd():
return ''
def getcwdu():
return ''

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"""
A static version of getattr.
This is a backport of the Python 3 code with a little bit of additional
information returned to enable Jedi to make decisions.
"""
import types
from jedi._compatibility import py_version
_sentinel = object()
def _check_instance(obj, attr):
instance_dict = {}
try:
instance_dict = object.__getattribute__(obj, "__dict__")
except AttributeError:
pass
return dict.get(instance_dict, attr, _sentinel)
def _check_class(klass, attr):
for entry in _static_getmro(klass):
if _shadowed_dict(type(entry)) is _sentinel:
try:
return entry.__dict__[attr]
except KeyError:
pass
return _sentinel
def _is_type(obj):
try:
_static_getmro(obj)
except TypeError:
return False
return True
def _shadowed_dict_newstyle(klass):
dict_attr = type.__dict__["__dict__"]
for entry in _static_getmro(klass):
try:
class_dict = dict_attr.__get__(entry)["__dict__"]
except KeyError:
pass
else:
if not (type(class_dict) is types.GetSetDescriptorType and
class_dict.__name__ == "__dict__" and
class_dict.__objclass__ is entry):
return class_dict
return _sentinel
def _static_getmro_newstyle(klass):
return type.__dict__['__mro__'].__get__(klass)
if py_version >= 30:
_shadowed_dict = _shadowed_dict_newstyle
_get_type = type
_static_getmro = _static_getmro_newstyle
else:
def _shadowed_dict(klass):
"""
In Python 2 __dict__ is not overwritable:
class Foo(object): pass
setattr(Foo, '__dict__', 4)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: __dict__ must be a dictionary object
It applies to both newstyle and oldstyle classes:
class Foo(object): pass
setattr(Foo, '__dict__', 4)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: attribute '__dict__' of 'type' objects is not writable
It also applies to instances of those objects. However to keep things
straight forward, newstyle classes always use the complicated way of
accessing it while oldstyle classes just use getattr.
"""
if type(klass) is _oldstyle_class_type:
return getattr(klass, '__dict__', _sentinel)
return _shadowed_dict_newstyle(klass)
class _OldStyleClass():
pass
_oldstyle_instance_type = type(_OldStyleClass())
_oldstyle_class_type = type(_OldStyleClass)
def _get_type(obj):
type_ = object.__getattribute__(obj, '__class__')
if type_ is _oldstyle_instance_type:
# Somehow for old style classes we need to access it directly.
return obj.__class__
return type_
def _static_getmro(klass):
if type(klass) is _oldstyle_class_type:
def oldstyle_mro(klass):
"""
Oldstyle mro is a really simplistic way of look up mro:
https://stackoverflow.com/questions/54867/what-is-the-difference-between-old-style-and-new-style-classes-in-python
"""
yield klass
for base in klass.__bases__:
for yield_from in oldstyle_mro(base):
yield yield_from
return oldstyle_mro(klass)
return _static_getmro_newstyle(klass)
def _safe_hasattr(obj, name):
return _check_class(_get_type(obj), name) is not _sentinel
def _safe_is_data_descriptor(obj):
return (_safe_hasattr(obj, '__set__') or _safe_hasattr(obj, '__delete__'))
def getattr_static(obj, attr, default=_sentinel):
"""Retrieve attributes without triggering dynamic lookup via the
descriptor protocol, __getattr__ or __getattribute__.
Note: this function may not be able to retrieve all attributes
that getattr can fetch (like dynamically created attributes)
and may find attributes that getattr can't (like descriptors
that raise AttributeError). It can also return descriptor objects
instead of instance members in some cases. See the
documentation for details.
Returns a tuple `(attr, is_get_descriptor)`. is_get_descripter means that
the attribute is a descriptor that has a `__get__` attribute.
"""
instance_result = _sentinel
if not _is_type(obj):
klass = _get_type(obj)
dict_attr = _shadowed_dict(klass)
if (dict_attr is _sentinel or
type(dict_attr) is types.MemberDescriptorType):
instance_result = _check_instance(obj, attr)
else:
klass = obj
klass_result = _check_class(klass, attr)
if instance_result is not _sentinel and klass_result is not _sentinel:
if _safe_hasattr(klass_result, '__get__') \
and _safe_is_data_descriptor(klass_result):
# A get/set descriptor has priority over everything.
return klass_result, True
if instance_result is not _sentinel:
return instance_result, False
if klass_result is not _sentinel:
return klass_result, _safe_hasattr(klass_result, '__get__')
if obj is klass:
# for types we check the metaclass too
for entry in _static_getmro(type(klass)):
if _shadowed_dict(type(entry)) is _sentinel:
try:
return entry.__dict__[attr], False
except KeyError:
pass
if default is not _sentinel:
return default, False
raise AttributeError(attr)

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"""
Used only for REPL Completion.
"""
import inspect
import os
from jedi import settings
from jedi.evaluate import compiled
from jedi.cache import underscore_memoization
from jedi.evaluate import imports
from jedi.evaluate.context import Context
from jedi.evaluate.cache import evaluator_function_cache
from jedi.evaluate.compiled.getattr_static import getattr_static
class MixedObject(object):
"""
A ``MixedObject`` is used in two ways:
1. It uses the default logic of ``parser.python.tree`` objects,
2. except for getattr calls. The names dicts are generated in a fashion
like ``CompiledObject``.
This combined logic makes it possible to provide more powerful REPL
completion. It allows side effects that are not noticable with the default
parser structure to still be completeable.
The biggest difference from CompiledObject to MixedObject is that we are
generally dealing with Python code and not with C code. This will generate
fewer special cases, because we in Python you don't have the same freedoms
to modify the runtime.
"""
def __init__(self, evaluator, parent_context, compiled_object, tree_context):
self.evaluator = evaluator
self.parent_context = parent_context
self.compiled_object = compiled_object
self._context = tree_context
self.obj = compiled_object.obj
# We have to overwrite everything that has to do with trailers, name
# lookups and filters to make it possible to route name lookups towards
# compiled objects and the rest towards tree node contexts.
def eval_trailer(*args, **kwags):
return Context.eval_trailer(*args, **kwags)
def py__getattribute__(*args, **kwargs):
return Context.py__getattribute__(*args, **kwargs)
def get_filters(self, *args, **kwargs):
yield MixedObjectFilter(self.evaluator, self)
def __repr__(self):
return '<%s: %s>' % (type(self).__name__, repr(self.obj))
def __getattr__(self, name):
return getattr(self._context, name)
class MixedName(compiled.CompiledName):
"""
The ``CompiledName._compiled_object`` is our MixedObject.
"""
@property
def start_pos(self):
contexts = list(self.infer())
if not contexts:
# This means a start_pos that doesn't exist (compiled objects).
return (0, 0)
return contexts[0].name.start_pos
@start_pos.setter
def start_pos(self, value):
# Ignore the __init__'s start_pos setter call.
pass
@underscore_memoization
def infer(self):
obj = self.parent_context.obj
try:
# TODO use logic from compiled.CompiledObjectFilter
obj = getattr(obj, self.string_name)
except AttributeError:
# Happens e.g. in properties of
# PyQt4.QtGui.QStyleOptionComboBox.currentText
# -> just set it to None
obj = None
return [_create(self._evaluator, obj, parent_context=self.parent_context)]
@property
def api_type(self):
return next(iter(self.infer())).api_type
class MixedObjectFilter(compiled.CompiledObjectFilter):
name_class = MixedName
def __init__(self, evaluator, mixed_object, is_instance=False):
super(MixedObjectFilter, self).__init__(
evaluator, mixed_object, is_instance)
self._mixed_object = mixed_object
#def _create(self, name):
#return MixedName(self._evaluator, self._compiled_object, name)
@evaluator_function_cache()
def _load_module(evaluator, path, python_object):
module = evaluator.grammar.parse(
path=path,
cache=True,
diff_cache=True,
cache_path=settings.cache_directory
).get_root_node()
python_module = inspect.getmodule(python_object)
evaluator.modules[python_module.__name__] = module
return module
def _get_object_to_check(python_object):
"""Check if inspect.getfile has a chance to find the source."""
if (inspect.ismodule(python_object) or
inspect.isclass(python_object) or
inspect.ismethod(python_object) or
inspect.isfunction(python_object) or
inspect.istraceback(python_object) or
inspect.isframe(python_object) or
inspect.iscode(python_object)):
return python_object
try:
return python_object.__class__
except AttributeError:
raise TypeError # Prevents computation of `repr` within inspect.
def find_syntax_node_name(evaluator, python_object):
try:
python_object = _get_object_to_check(python_object)
path = inspect.getsourcefile(python_object)
except TypeError:
# The type might not be known (e.g. class_with_dict.__weakref__)
return None, None
if path is None or not os.path.exists(path):
# The path might not exist or be e.g. <stdin>.
return None, None
module = _load_module(evaluator, path, python_object)
if inspect.ismodule(python_object):
# We don't need to check names for modules, because there's not really
# a way to write a module in a module in Python (and also __name__ can
# be something like ``email.utils``).
return module, path
try:
name_str = python_object.__name__
except AttributeError:
# Stuff like python_function.__code__.
return None, None
if name_str == '<lambda>':
return None, None # It's too hard to find lambdas.
# Doesn't always work (e.g. os.stat_result)
try:
names = module.get_used_names()[name_str]
except KeyError:
return None, None
names = [n for n in names if n.is_definition()]
try:
code = python_object.__code__
# By using the line number of a code object we make the lookup in a
# file pretty easy. There's still a possibility of people defining
# stuff like ``a = 3; foo(a); a = 4`` on the same line, but if people
# do so we just don't care.
line_nr = code.co_firstlineno
except AttributeError:
pass
else:
line_names = [name for name in names if name.start_pos[0] == line_nr]
# There's a chance that the object is not available anymore, because
# the code has changed in the background.
if line_names:
return line_names[-1].parent, path
# It's really hard to actually get the right definition, here as a last
# resort we just return the last one. This chance might lead to odd
# completions at some points but will lead to mostly correct type
# inference, because people tend to define a public name in a module only
# once.
return names[-1].parent, path
@compiled.compiled_objects_cache('mixed_cache')
def _create(evaluator, obj, parent_context=None, *args):
tree_node, path = find_syntax_node_name(evaluator, obj)
compiled_object = compiled.create(
evaluator, obj, parent_context=parent_context.compiled_object)
if tree_node is None:
return compiled_object
module_node = tree_node.get_root_node()
if parent_context.tree_node.get_root_node() == module_node:
module_context = parent_context.get_root_context()
else:
from jedi.evaluate.representation import ModuleContext
module_context = ModuleContext(evaluator, module_node, path=path)
# TODO this __name__ is probably wrong.
name = compiled_object.get_root_context().py__name__()
imports.add_module(evaluator, name, module_context)
tree_context = module_context.create_context(
tree_node,
node_is_context=True,
node_is_object=True
)
if tree_node.type == 'classdef':
if not inspect.isclass(obj):
# Is an instance, not a class.
tree_context, = tree_context.execute_evaluated()
return MixedObject(
evaluator,
parent_context,
compiled_object,
tree_context=tree_context
)

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from jedi._compatibility import Python3Method
from jedi.common import unite
from parso.python.tree import ExprStmt, CompFor
from jedi.parser_utils import clean_scope_docstring, get_doc_with_call_signature
class Context(object):
"""
Should be defined, otherwise the API returns empty types.
"""
"""
To be defined by subclasses.
"""
predefined_names = {}
tree_node = None
def __init__(self, evaluator, parent_context=None):
self.evaluator = evaluator
self.parent_context = parent_context
@property
def api_type(self):
# By default just lower name of the class. Can and should be
# overwritten.
return self.__class__.__name__.lower()
def get_root_context(self):
context = self
while True:
if context.parent_context is None:
return context
context = context.parent_context
def execute(self, arguments):
return self.evaluator.execute(self, arguments)
def execute_evaluated(self, *value_list):
"""
Execute a function with already executed arguments.
"""
from jedi.evaluate.param import ValuesArguments
arguments = ValuesArguments([[value] for value in value_list])
return self.execute(arguments)
def eval_node(self, node):
return self.evaluator.eval_element(self, node)
def eval_stmt(self, stmt, seek_name=None):
return self.evaluator.eval_statement(self, stmt, seek_name)
def eval_trailer(self, types, trailer):
return self.evaluator.eval_trailer(self, types, trailer)
@Python3Method
def py__getattribute__(self, name_or_str, name_context=None, position=None,
search_global=False, is_goto=False,
analysis_errors=True):
if name_context is None:
name_context = self
return self.evaluator.find_types(
self, name_or_str, name_context, position, search_global, is_goto,
analysis_errors)
def create_context(self, node, node_is_context=False, node_is_object=False):
return self.evaluator.create_context(self, node, node_is_context, node_is_object)
def is_class(self):
return False
def py__bool__(self):
"""
Since Wrapper is a super class for classes, functions and modules,
the return value will always be true.
"""
return True
def py__doc__(self, include_call_signature=False):
try:
self.tree_node.get_doc_node
except AttributeError:
return ''
else:
if include_call_signature:
return get_doc_with_call_signature(self.tree_node)
else:
return clean_scope_docstring(self.tree_node)
return None
class TreeContext(Context):
def __init__(self, evaluator, parent_context=None):
super(TreeContext, self).__init__(evaluator, parent_context)
self.predefined_names = {}
def __repr__(self):
return '<%s: %s>' % (self.__class__.__name__, self.tree_node)
class AbstractLazyContext(object):
def __init__(self, data):
self.data = data
def __repr__(self):
return '<%s: %s>' % (self.__class__.__name__, self.data)
def infer(self):
raise NotImplementedError
class LazyKnownContext(AbstractLazyContext):
"""data is a context."""
def infer(self):
return set([self.data])
class LazyKnownContexts(AbstractLazyContext):
"""data is a set of contexts."""
def infer(self):
return self.data
class LazyUnknownContext(AbstractLazyContext):
def __init__(self):
super(LazyUnknownContext, self).__init__(None)
def infer(self):
return set()
class LazyTreeContext(AbstractLazyContext):
def __init__(self, context, node):
super(LazyTreeContext, self).__init__(node)
self._context = context
# We need to save the predefined names. It's an unfortunate side effect
# that needs to be tracked otherwise results will be wrong.
self._predefined_names = dict(context.predefined_names)
def infer(self):
old, self._context.predefined_names = \
self._context.predefined_names, self._predefined_names
try:
return self._context.eval_node(self.data)
finally:
self._context.predefined_names = old
def get_merged_lazy_context(lazy_contexts):
if len(lazy_contexts) > 1:
return MergedLazyContexts(lazy_contexts)
else:
return lazy_contexts[0]
class MergedLazyContexts(AbstractLazyContext):
"""data is a list of lazy contexts."""
def infer(self):
return unite(l.infer() for l in self.data)
class ContextualizedNode(object):
def __init__(self, context, node):
self.context = context
self._node = node
def get_root_context(self):
return self.context.get_root_context()
def infer(self):
return self.context.eval_node(self._node)
class ContextualizedName(ContextualizedNode):
# TODO merge with TreeNameDefinition?!
@property
def name(self):
return self._node
def assignment_indexes(self):
"""
Returns an array of tuple(int, node) of the indexes that are used in
tuple assignments.
For example if the name is ``y`` in the following code::
x, (y, z) = 2, ''
would result in ``[(1, xyz_node), (0, yz_node)]``.
"""
indexes = []
node = self._node.parent
compare = self._node
while node is not None:
if node.type in ('testlist', 'testlist_comp', 'testlist_star_expr', 'exprlist'):
for i, child in enumerate(node.children):
if child == compare:
indexes.insert(0, (int(i / 2), node))
break
else:
raise LookupError("Couldn't find the assignment.")
elif isinstance(node, (ExprStmt, CompFor)):
break
compare = node
node = node.parent
return indexes

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"""
Docstrings are another source of information for functions and classes.
:mod:`jedi.evaluate.dynamic` tries to find all executions of functions, while
the docstring parsing is much easier. There are three different types of
docstrings that |jedi| understands:
- `Sphinx <http://sphinx-doc.org/markup/desc.html#info-field-lists>`_
- `Epydoc <http://epydoc.sourceforge.net/manual-fields.html>`_
- `Numpydoc <https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt>`_
For example, the sphinx annotation ``:type foo: str`` clearly states that the
type of ``foo`` is ``str``.
As an addition to parameter searching, this module also provides return
annotations.
"""
import re
from textwrap import dedent
from parso import parse
from jedi._compatibility import u
from jedi.common import unite
from jedi.evaluate import context
from jedi.evaluate.cache import evaluator_method_cache
from jedi.common import indent_block
from jedi.evaluate.iterable import SequenceLiteralContext, FakeSequence
DOCSTRING_PARAM_PATTERNS = [
r'\s*:type\s+%s:\s*([^\n]+)', # Sphinx
r'\s*:param\s+(\w+)\s+%s:[^\n]*', # Sphinx param with type
r'\s*@type\s+%s:\s*([^\n]+)', # Epydoc
]
DOCSTRING_RETURN_PATTERNS = [
re.compile(r'\s*:rtype:\s*([^\n]+)', re.M), # Sphinx
re.compile(r'\s*@rtype:\s*([^\n]+)', re.M), # Epydoc
]
REST_ROLE_PATTERN = re.compile(r':[^`]+:`([^`]+)`')
try:
from numpydoc.docscrape import NumpyDocString
except ImportError:
def _search_param_in_numpydocstr(docstr, param_str):
return []
def _search_return_in_numpydocstr(docstr):
return []
else:
def _search_param_in_numpydocstr(docstr, param_str):
"""Search `docstr` (in numpydoc format) for type(-s) of `param_str`."""
try:
# This is a non-public API. If it ever changes we should be
# prepared and return gracefully.
params = NumpyDocString(docstr)._parsed_data['Parameters']
except (KeyError, AttributeError):
return []
for p_name, p_type, p_descr in params:
if p_name == param_str:
m = re.match('([^,]+(,[^,]+)*?)(,[ ]*optional)?$', p_type)
if m:
p_type = m.group(1)
return list(_expand_typestr(p_type))
return []
def _search_return_in_numpydocstr(docstr):
"""
Search `docstr` (in numpydoc format) for type(-s) of function returns.
"""
doc = NumpyDocString(docstr)
try:
# This is a non-public API. If it ever changes we should be
# prepared and return gracefully.
returns = doc._parsed_data['Returns']
returns += doc._parsed_data['Yields']
except (KeyError, AttributeError):
raise StopIteration
for r_name, r_type, r_descr in returns:
#Return names are optional and if so the type is in the name
if not r_type:
r_type = r_name
for type_ in _expand_typestr(r_type):
yield type_
def _expand_typestr(type_str):
"""
Attempts to interpret the possible types in `type_str`
"""
# Check if alternative types are specified with 'or'
if re.search('\\bor\\b', type_str):
for t in type_str.split('or'):
yield t.split('of')[0].strip()
# Check if like "list of `type`" and set type to list
elif re.search('\\bof\\b', type_str):
yield type_str.split('of')[0]
# Check if type has is a set of valid literal values eg: {'C', 'F', 'A'}
elif type_str.startswith('{'):
node = parse(type_str, version='3.6').children[0]
if node.type == 'atom':
for leaf in node.children[1].children:
if leaf.type == 'number':
if '.' in leaf.value:
yield 'float'
else:
yield 'int'
elif leaf.type == 'string':
if 'b' in leaf.string_prefix.lower():
yield 'bytes'
else:
yield 'str'
# Ignore everything else.
# Otherwise just work with what we have.
else:
yield type_str
def _search_param_in_docstr(docstr, param_str):
"""
Search `docstr` for type(-s) of `param_str`.
>>> _search_param_in_docstr(':type param: int', 'param')
['int']
>>> _search_param_in_docstr('@type param: int', 'param')
['int']
>>> _search_param_in_docstr(
... ':type param: :class:`threading.Thread`', 'param')
['threading.Thread']
>>> bool(_search_param_in_docstr('no document', 'param'))
False
>>> _search_param_in_docstr(':param int param: some description', 'param')
['int']
"""
# look at #40 to see definitions of those params
patterns = [re.compile(p % re.escape(param_str))
for p in DOCSTRING_PARAM_PATTERNS]
for pattern in patterns:
match = pattern.search(docstr)
if match:
return [_strip_rst_role(match.group(1))]
return (_search_param_in_numpydocstr(docstr, param_str) or
[])
def _strip_rst_role(type_str):
"""
Strip off the part looks like a ReST role in `type_str`.
>>> _strip_rst_role(':class:`ClassName`') # strip off :class:
'ClassName'
>>> _strip_rst_role(':py:obj:`module.Object`') # works with domain
'module.Object'
>>> _strip_rst_role('ClassName') # do nothing when not ReST role
'ClassName'
See also:
http://sphinx-doc.org/domains.html#cross-referencing-python-objects
"""
match = REST_ROLE_PATTERN.match(type_str)
if match:
return match.group(1)
else:
return type_str
def _evaluate_for_statement_string(module_context, string):
code = dedent(u("""
def pseudo_docstring_stuff():
'''
Create a pseudo function for docstring statements.
Need this docstring so that if the below part is not valid Python this
is still a function.
'''
{0}
"""))
if string is None:
return []
for element in re.findall('((?:\w+\.)*\w+)\.', string):
# Try to import module part in dotted name.
# (e.g., 'threading' in 'threading.Thread').
string = 'import %s\n' % element + string
# Take the default grammar here, if we load the Python 2.7 grammar here, it
# will be impossible to use `...` (Ellipsis) as a token. Docstring types
# don't need to conform with the current grammar.
grammar = module_context.evaluator.latest_grammar
module = grammar.parse(code.format(indent_block(string)))
try:
funcdef = next(module.iter_funcdefs())
# First pick suite, then simple_stmt and then the node,
# which is also not the last item, because there's a newline.
stmt = funcdef.children[-1].children[-1].children[-2]
except (AttributeError, IndexError):
return []
from jedi.evaluate.representation import FunctionContext
function_context = FunctionContext(
module_context.evaluator,
module_context,
funcdef
)
func_execution_context = function_context.get_function_execution()
# Use the module of the param.
# TODO this module is not the module of the param in case of a function
# call. In that case it's the module of the function call.
# stuffed with content from a function call.
return list(_execute_types_in_stmt(func_execution_context, stmt))
def _execute_types_in_stmt(module_context, stmt):
"""
Executing all types or general elements that we find in a statement. This
doesn't include tuple, list and dict literals, because the stuff they
contain is executed. (Used as type information).
"""
definitions = module_context.eval_node(stmt)
return unite(_execute_array_values(module_context.evaluator, d) for d in definitions)
def _execute_array_values(evaluator, array):
"""
Tuples indicate that there's not just one return value, but the listed
ones. `(str, int)` means that it returns a tuple with both types.
"""
if isinstance(array, SequenceLiteralContext):
values = []
for lazy_context in array.py__iter__():
objects = unite(_execute_array_values(evaluator, typ) for typ in lazy_context.infer())
values.append(context.LazyKnownContexts(objects))
return set([FakeSequence(evaluator, array.array_type, values)])
else:
return array.execute_evaluated()
@evaluator_method_cache()
def infer_param(execution_context, param):
from jedi.evaluate.instance import AnonymousInstanceFunctionExecution
def eval_docstring(docstring):
return set(
p
for param_str in _search_param_in_docstr(docstring, param.name.value)
for p in _evaluate_for_statement_string(module_context, param_str)
)
module_context = execution_context.get_root_context()
func = param.get_parent_function()
if func.type == 'lambdef':
return set()
types = eval_docstring(execution_context.py__doc__())
if isinstance(execution_context, AnonymousInstanceFunctionExecution) and \
execution_context.function_context.name.string_name == '__init__':
class_context = execution_context.instance.class_context
types |= eval_docstring(class_context.py__doc__())
return types
@evaluator_method_cache()
def infer_return_types(function_context):
def search_return_in_docstr(code):
for p in DOCSTRING_RETURN_PATTERNS:
match = p.search(code)
if match:
yield _strip_rst_role(match.group(1))
# Check for numpy style return hint
for type_ in _search_return_in_numpydocstr(code):
yield type_
for type_str in search_return_in_docstr(function_context.py__doc__()):
for type_eval in _evaluate_for_statement_string(function_context.get_root_context(), type_str):
yield type_eval

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"""
One of the really important features of |jedi| is to have an option to
understand code like this::
def foo(bar):
bar. # completion here
foo(1)
There's no doubt wheter bar is an ``int`` or not, but if there's also a call
like ``foo('str')``, what would happen? Well, we'll just show both. Because
that's what a human would expect.
It works as follows:
- |Jedi| sees a param
- search for function calls named ``foo``
- execute these calls and check the input. This work with a ``ParamListener``.
"""
from parso.python import tree
from jedi import settings
from jedi import debug
from jedi.evaluate.cache import evaluator_function_cache
from jedi.evaluate import imports
from jedi.evaluate.param import TreeArguments, create_default_params
from jedi.evaluate.helpers import is_stdlib_path
from jedi.common import to_list, unite
from jedi.parser_utils import get_parent_scope
MAX_PARAM_SEARCHES = 20
class ParamListener(object):
"""
This listener is used to get the params for a function.
"""
def __init__(self):
self.param_possibilities = []
def execute(self, params):
self.param_possibilities += params
class MergedExecutedParams(object):
"""
Simulates being a parameter while actually just being multiple params.
"""
def __init__(self, executed_params):
self._executed_params = executed_params
def infer(self):
return unite(p.infer() for p in self._executed_params)
@debug.increase_indent
def search_params(evaluator, execution_context, funcdef):
"""
A dynamic search for param values. If you try to complete a type:
>>> def func(foo):
... foo
>>> func(1)
>>> func("")
It is not known what the type ``foo`` without analysing the whole code. You
have to look for all calls to ``func`` to find out what ``foo`` possibly
is.
"""
if not settings.dynamic_params:
return create_default_params(execution_context, funcdef)
evaluator.dynamic_params_depth += 1
try:
path = execution_context.get_root_context().py__file__()
if path is not None and is_stdlib_path(path):
# We don't want to search for usages in the stdlib. Usually people
# don't work with it (except if you are a core maintainer, sorry).
# This makes everything slower. Just disable it and run the tests,
# you will see the slowdown, especially in 3.6.
return create_default_params(execution_context, funcdef)
debug.dbg('Dynamic param search in %s.', funcdef.name.value, color='MAGENTA')
module_context = execution_context.get_root_context()
function_executions = _search_function_executions(
evaluator,
module_context,
funcdef
)
if function_executions:
zipped_params = zip(*list(
function_execution.get_params()
for function_execution in function_executions
))
params = [MergedExecutedParams(executed_params) for executed_params in zipped_params]
# Evaluate the ExecutedParams to types.
else:
return create_default_params(execution_context, funcdef)
debug.dbg('Dynamic param result finished', color='MAGENTA')
return params
finally:
evaluator.dynamic_params_depth -= 1
@evaluator_function_cache(default=[])
@to_list
def _search_function_executions(evaluator, module_context, funcdef):
"""
Returns a list of param names.
"""
from jedi.evaluate import representation as er
func_string_name = funcdef.name.value
compare_node = funcdef
if func_string_name == '__init__':
cls = get_parent_scope(funcdef)
if isinstance(cls, tree.Class):
func_string_name = cls.name.value
compare_node = cls
found_executions = False
i = 0
for for_mod_context in imports.get_modules_containing_name(
evaluator, [module_context], func_string_name):
if not isinstance(module_context, er.ModuleContext):
return
for name, trailer in _get_possible_nodes(for_mod_context, func_string_name):
i += 1
# This is a simple way to stop Jedi's dynamic param recursion
# from going wild: The deeper Jedi's in the recursion, the less
# code should be evaluated.
if i * evaluator.dynamic_params_depth > MAX_PARAM_SEARCHES:
return
random_context = evaluator.create_context(for_mod_context, name)
for function_execution in _check_name_for_execution(
evaluator, random_context, compare_node, name, trailer):
found_executions = True
yield function_execution
# If there are results after processing a module, we're probably
# good to process. This is a speed optimization.
if found_executions:
return
def _get_possible_nodes(module_context, func_string_name):
try:
names = module_context.tree_node.get_used_names()[func_string_name]
except KeyError:
return
for name in names:
bracket = name.get_next_leaf()
trailer = bracket.parent
if trailer.type == 'trailer' and bracket == '(':
yield name, trailer
def _check_name_for_execution(evaluator, context, compare_node, name, trailer):
from jedi.evaluate import representation as er, instance
def create_func_excs():
arglist = trailer.children[1]
if arglist == ')':
arglist = ()
args = TreeArguments(evaluator, context, arglist, trailer)
if value_node.type == 'funcdef':
yield value.get_function_execution(args)
else:
created_instance = instance.TreeInstance(
evaluator,
value.parent_context,
value,
args
)
for execution in created_instance.create_init_executions():
yield execution
for value in evaluator.goto_definitions(context, name):
value_node = value.tree_node
if compare_node == value_node:
for func_execution in create_func_excs():
yield func_execution
elif isinstance(value.parent_context, er.FunctionExecutionContext) and \
compare_node.type == 'funcdef':
# Here we're trying to find decorators by checking the first
# parameter. It's not very generic though. Should find a better
# solution that also applies to nested decorators.
params = value.parent_context.get_params()
if len(params) != 1:
continue
values = params[0].infer()
nodes = [v.tree_node for v in values]
if nodes == [compare_node]:
# Found a decorator.
module_context = context.get_root_context()
execution_context = next(create_func_excs())
for name, trailer in _get_possible_nodes(module_context, params[0].string_name):
if value_node.start_pos < name.start_pos < value_node.end_pos:
random_context = evaluator.create_context(execution_context, name)
iterator = _check_name_for_execution(
evaluator,
random_context,
compare_node,
name,
trailer
)
for function_execution in iterator:
yield function_execution

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"""
Filters are objects that you can use to filter names in different scopes. They
are needed for name resolution.
"""
from abc import abstractmethod
from parso.tree import search_ancestor
from jedi.evaluate import flow_analysis
from jedi.common import to_list, unite
from jedi.parser_utils import get_parent_scope
class AbstractNameDefinition(object):
start_pos = None
string_name = None
parent_context = None
tree_name = None
@abstractmethod
def infer(self):
raise NotImplementedError
@abstractmethod
def goto(self):
# Typically names are already definitions and therefore a goto on that
# name will always result on itself.
return set([self])
def get_root_context(self):
return self.parent_context.get_root_context()
def __repr__(self):
if self.start_pos is None:
return '<%s: %s>' % (self.__class__.__name__, self.string_name)
return '<%s: %s@%s>' % (self.__class__.__name__, self.string_name, self.start_pos)
def execute(self, arguments):
return unite(context.execute(arguments) for context in self.infer())
def execute_evaluated(self, *args, **kwargs):
return unite(context.execute_evaluated(*args, **kwargs) for context in self.infer())
@property
def api_type(self):
return self.parent_context.api_type
class AbstractTreeName(AbstractNameDefinition):
def __init__(self, parent_context, tree_name):
self.parent_context = parent_context
self.tree_name = tree_name
def goto(self):
return self.parent_context.evaluator.goto(self.parent_context, self.tree_name)
@property
def string_name(self):
return self.tree_name.value
@property
def start_pos(self):
return self.tree_name.start_pos
class ContextNameMixin(object):
def infer(self):
return set([self._context])
def get_root_context(self):
if self.parent_context is None:
return self._context
return super(ContextNameMixin, self).get_root_context()
@property
def api_type(self):
return self._context.api_type
class ContextName(ContextNameMixin, AbstractTreeName):
def __init__(self, context, tree_name):
super(ContextName, self).__init__(context.parent_context, tree_name)
self._context = context
class TreeNameDefinition(AbstractTreeName):
_API_TYPES = dict(
import_name='module',
import_from='module',
funcdef='function',
param='param',
classdef='class',
)
def infer(self):
# Refactor this, should probably be here.
from jedi.evaluate.finder import _name_to_types
return _name_to_types(self.parent_context.evaluator, self.parent_context, self.tree_name)
@property
def api_type(self):
definition = self.tree_name.get_definition(import_name_always=True)
if definition is None:
return 'statement'
return self._API_TYPES.get(definition.type, 'statement')
class ParamName(AbstractTreeName):
api_type = 'param'
def __init__(self, parent_context, tree_name):
self.parent_context = parent_context
self.tree_name = tree_name
def infer(self):
return self.get_param().infer()
def get_param(self):
params = self.parent_context.get_params()
param_node = search_ancestor(self.tree_name, 'param')
return params[param_node.position_index]
class AnonymousInstanceParamName(ParamName):
def infer(self):
param_node = search_ancestor(self.tree_name, 'param')
# TODO I think this should not belong here. It's not even really true,
# because classmethod and other descriptors can change it.
if param_node.position_index == 0:
# This is a speed optimization, to return the self param (because
# it's known). This only affects anonymous instances.
return set([self.parent_context.instance])
else:
return self.get_param().infer()
class AbstractFilter(object):
_until_position = None
def _filter(self, names):
if self._until_position is not None:
return [n for n in names if n.start_pos < self._until_position]
return names
@abstractmethod
def get(self, name):
raise NotImplementedError
@abstractmethod
def values(self):
raise NotImplementedError
class AbstractUsedNamesFilter(AbstractFilter):
name_class = TreeNameDefinition
def __init__(self, context, parser_scope):
self._parser_scope = parser_scope
self._used_names = self._parser_scope.get_root_node().get_used_names()
self.context = context
def get(self, name):
try:
names = self._used_names[str(name)]
except KeyError:
return []
return self._convert_names(self._filter(names))
def _convert_names(self, names):
return [self.name_class(self.context, name) for name in names]
def values(self):
return self._convert_names(name for name_list in self._used_names.values()
for name in self._filter(name_list))
def __repr__(self):
return '<%s: %s>' % (self.__class__.__name__, self.context)
class ParserTreeFilter(AbstractUsedNamesFilter):
def __init__(self, evaluator, context, node_context=None, until_position=None,
origin_scope=None):
"""
node_context is an option to specify a second context for use cases
like the class mro where the parent class of a new name would be the
context, but for some type inference it's important to have a local
context of the other classes.
"""
if node_context is None:
node_context = context
super(ParserTreeFilter, self).__init__(context, node_context.tree_node)
self._node_context = node_context
self._origin_scope = origin_scope
self._until_position = until_position
def _filter(self, names):
names = super(ParserTreeFilter, self)._filter(names)
names = [n for n in names if self._is_name_reachable(n)]
return list(self._check_flows(names))
def _is_name_reachable(self, name):
if not name.is_definition():
return False
parent = name.parent
if parent.type == 'trailer':
return False
base_node = parent if parent.type in ('classdef', 'funcdef') else name
return get_parent_scope(base_node) == self._parser_scope
def _check_flows(self, names):
for name in sorted(names, key=lambda name: name.start_pos, reverse=True):
check = flow_analysis.reachability_check(
self._node_context, self._parser_scope, name, self._origin_scope
)
if check is not flow_analysis.UNREACHABLE:
yield name
if check is flow_analysis.REACHABLE:
break
class FunctionExecutionFilter(ParserTreeFilter):
param_name = ParamName
def __init__(self, evaluator, context, node_context=None,
until_position=None, origin_scope=None):
super(FunctionExecutionFilter, self).__init__(
evaluator,
context,
node_context,
until_position,
origin_scope
)
@to_list
def _convert_names(self, names):
for name in names:
param = search_ancestor(name, 'param')
if param:
yield self.param_name(self.context, name)
else:
yield TreeNameDefinition(self.context, name)
class AnonymousInstanceFunctionExecutionFilter(FunctionExecutionFilter):
param_name = AnonymousInstanceParamName
class GlobalNameFilter(AbstractUsedNamesFilter):
def __init__(self, context, parser_scope):
super(GlobalNameFilter, self).__init__(context, parser_scope)
@to_list
def _filter(self, names):
for name in names:
if name.parent.type == 'global_stmt':
yield name
class DictFilter(AbstractFilter):
def __init__(self, dct):
self._dct = dct
def get(self, name):
try:
value = self._convert(name, self._dct[str(name)])
except KeyError:
return []
return list(self._filter([value]))
def values(self):
return self._filter(self._convert(*item) for item in self._dct.items())
def _convert(self, name, value):
return value
def get_global_filters(evaluator, context, until_position, origin_scope):
"""
Returns all filters in order of priority for name resolution.
For global name lookups. The filters will handle name resolution
themselves, but here we gather possible filters downwards.
>>> from jedi._compatibility import u, no_unicode_pprint
>>> from jedi import Script
>>> script = Script(u('''
... x = ['a', 'b', 'c']
... def func():
... y = None
... '''))
>>> module_node = script._get_module_node()
>>> scope = next(module_node.iter_funcdefs())
>>> scope
<Function: func@3-5>
>>> context = script._get_module().create_context(scope)
>>> filters = list(get_global_filters(context.evaluator, context, (4, 0), None))
First we get the names names from the function scope.
>>> no_unicode_pprint(filters[0])
<ParserTreeFilter: <ModuleContext: @2-5>>
>>> sorted(str(n) for n in filters[0].values())
['<TreeNameDefinition: func@(3, 4)>', '<TreeNameDefinition: x@(2, 0)>']
>>> filters[0]._until_position
(4, 0)
Then it yields the names from one level "lower". In this example, this is
the module scope. As a side note, you can see, that the position in the
filter is now None, because typically the whole module is loaded before the
function is called.
>>> filters[1].values() # global names -> there are none in our example.
[]
>>> list(filters[2].values()) # package modules -> Also empty.
[]
>>> sorted(name.string_name for name in filters[3].values()) # Module attributes
['__doc__', '__file__', '__name__', '__package__']
>>> print(filters[1]._until_position)
None
Finally, it yields the builtin filter, if `include_builtin` is
true (default).
>>> filters[4].values() #doctest: +ELLIPSIS
[<CompiledName: ...>, ...]
"""
from jedi.evaluate.representation import FunctionExecutionContext
while context is not None:
# Names in methods cannot be resolved within the class.
for filter in context.get_filters(
search_global=True,
until_position=until_position,
origin_scope=origin_scope):
yield filter
if isinstance(context, FunctionExecutionContext):
# The position should be reset if the current scope is a function.
until_position = None
context = context.parent_context
# Add builtins to the global scope.
for filter in evaluator.BUILTINS.get_filters(search_global=True):
yield filter

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"""
Searching for names with given scope and name. This is very central in Jedi and
Python. The name resolution is quite complicated with descripter,
``__getattribute__``, ``__getattr__``, ``global``, etc.
If you want to understand name resolution, please read the first few chapters
in http://blog.ionelmc.ro/2015/02/09/understanding-python-metaclasses/.
Flow checks
+++++++++++
Flow checks are not really mature. There's only a check for ``isinstance``. It
would check whether a flow has the form of ``if isinstance(a, type_or_tuple)``.
Unfortunately every other thing is being ignored (e.g. a == '' would be easy to
check for -> a is a string). There's big potential in these checks.
"""
from parso.python import tree
from parso.tree import search_ancestor
from jedi import debug
from jedi.common import unite
from jedi import settings
from jedi.evaluate import representation as er
from jedi.evaluate.instance import AbstractInstanceContext
from jedi.evaluate import compiled
from jedi.evaluate import pep0484
from jedi.evaluate import iterable
from jedi.evaluate import imports
from jedi.evaluate import analysis
from jedi.evaluate import flow_analysis
from jedi.evaluate import param
from jedi.evaluate import helpers
from jedi.evaluate.filters import get_global_filters, TreeNameDefinition
from jedi.evaluate.context import ContextualizedName, ContextualizedNode
from jedi.parser_utils import is_scope, get_parent_scope
class NameFinder(object):
def __init__(self, evaluator, context, name_context, name_or_str,
position=None, analysis_errors=True):
self._evaluator = evaluator
# Make sure that it's not just a syntax tree node.
self._context = context
self._name_context = name_context
self._name = name_or_str
if isinstance(name_or_str, tree.Name):
self._string_name = name_or_str.value
else:
self._string_name = name_or_str
self._position = position
self._found_predefined_types = None
self._analysis_errors = analysis_errors
@debug.increase_indent
def find(self, filters, attribute_lookup):
"""
:params bool attribute_lookup: Tell to logic if we're accessing the
attribute or the contents of e.g. a function.
"""
names = self.filter_name(filters)
if self._found_predefined_types is not None and names:
check = flow_analysis.reachability_check(
self._context, self._context.tree_node, self._name)
if check is flow_analysis.UNREACHABLE:
return set()
return self._found_predefined_types
types = self._names_to_types(names, attribute_lookup)
if not names and self._analysis_errors and not types \
and not (isinstance(self._name, tree.Name) and
isinstance(self._name.parent.parent, tree.Param)):
if isinstance(self._name, tree.Name):
if attribute_lookup:
analysis.add_attribute_error(
self._name_context, self._context, self._name)
else:
message = ("NameError: name '%s' is not defined."
% self._string_name)
analysis.add(self._name_context, 'name-error', self._name, message)
return types
def _get_origin_scope(self):
if isinstance(self._name, tree.Name):
scope = self._name
while scope.parent is not None:
# TODO why if classes?
if not isinstance(scope, tree.Scope):
break
scope = scope.parent
return scope
else:
return None
def get_filters(self, search_global=False):
origin_scope = self._get_origin_scope()
if search_global:
return get_global_filters(self._evaluator, self._context, self._position, origin_scope)
else:
return self._context.get_filters(search_global, self._position, origin_scope=origin_scope)
def filter_name(self, filters):
"""
Searches names that are defined in a scope (the different
``filters``), until a name fits.
"""
names = []
if self._context.predefined_names:
# TODO is this ok? node might not always be a tree.Name
node = self._name
while node is not None and not is_scope(node):
node = node.parent
if node.type in ("if_stmt", "for_stmt", "comp_for"):
try:
name_dict = self._context.predefined_names[node]
types = name_dict[self._string_name]
except KeyError:
continue
else:
self._found_predefined_types = types
break
for filter in filters:
names = filter.get(self._string_name)
if names:
if len(names) == 1:
n, = names
if isinstance(n, TreeNameDefinition):
# Something somewhere went terribly wrong. This
# typically happens when using goto on an import in an
# __init__ file. I think we need a better solution, but
# it's kind of hard, because for Jedi it's not clear
# that that name has not been defined, yet.
if n.tree_name == self._name:
if self._name.get_definition().type == 'import_from':
continue
break
debug.dbg('finder.filter_name "%s" in (%s): %s@%s', self._string_name,
self._context, names, self._position)
return list(names)
def _check_getattr(self, inst):
"""Checks for both __getattr__ and __getattribute__ methods"""
# str is important, because it shouldn't be `Name`!
name = compiled.create(self._evaluator, self._string_name)
# This is a little bit special. `__getattribute__` is in Python
# executed before `__getattr__`. But: I know no use case, where
# this could be practical and where Jedi would return wrong types.
# If you ever find something, let me know!
# We are inversing this, because a hand-crafted `__getattribute__`
# could still call another hand-crafted `__getattr__`, but not the
# other way around.
names = (inst.get_function_slot_names('__getattr__') or
inst.get_function_slot_names('__getattribute__'))
return inst.execute_function_slots(names, name)
def _names_to_types(self, names, attribute_lookup):
types = set()
types = unite(name.infer() for name in names)
debug.dbg('finder._names_to_types: %s -> %s', names, types)
if not names and isinstance(self._context, AbstractInstanceContext):
# handling __getattr__ / __getattribute__
return self._check_getattr(self._context)
# Add isinstance and other if/assert knowledge.
if not types and isinstance(self._name, tree.Name) and \
not isinstance(self._name_context, AbstractInstanceContext):
flow_scope = self._name
base_node = self._name_context.tree_node
if base_node.type == 'comp_for':
return types
while True:
flow_scope = get_parent_scope(flow_scope, include_flows=True)
n = _check_flow_information(self._name_context, flow_scope,
self._name, self._position)
if n is not None:
return n
if flow_scope == base_node:
break
return types
def _name_to_types(evaluator, context, tree_name):
types = []
node = tree_name.get_definition(import_name_always=True)
if node is None:
node = tree_name.parent
if node.type == 'global_stmt':
context = evaluator.create_context(context, tree_name)
finder = NameFinder(evaluator, context, context, tree_name.value)
filters = finder.get_filters(search_global=True)
# For global_stmt lookups, we only need the first possible scope,
# which means the function itself.
filters = [next(filters)]
return finder.find(filters, attribute_lookup=False)
elif node.type not in ('import_from', 'import_name'):
raise ValueError("Should not happen.")
typ = node.type
if typ == 'for_stmt':
types = pep0484.find_type_from_comment_hint_for(context, node, tree_name)
if types:
return types
if typ == 'with_stmt':
types = pep0484.find_type_from_comment_hint_with(context, node, tree_name)
if types:
return types
if typ in ('for_stmt', 'comp_for'):
try:
types = context.predefined_names[node][tree_name.value]
except KeyError:
cn = ContextualizedNode(context, node.children[3])
for_types = iterable.py__iter__types(evaluator, cn.infer(), cn)
c_node = ContextualizedName(context, tree_name)
types = check_tuple_assignments(evaluator, c_node, for_types)
elif typ == 'expr_stmt':
types = _remove_statements(evaluator, context, node, tree_name)
elif typ == 'with_stmt':
context_managers = context.eval_node(node.get_test_node_from_name(tree_name))
enter_methods = unite(
context_manager.py__getattribute__('__enter__')
for context_manager in context_managers
)
types = unite(method.execute_evaluated() for method in enter_methods)
elif typ in ('import_from', 'import_name'):
types = imports.infer_import(context, tree_name)
elif typ in ('funcdef', 'classdef'):
types = _apply_decorators(evaluator, context, node)
elif typ == 'try_stmt':
# TODO an exception can also be a tuple. Check for those.
# TODO check for types that are not classes and add it to
# the static analysis report.
exceptions = context.eval_node(tree_name.get_previous_sibling().get_previous_sibling())
types = unite(
evaluator.execute(t, param.ValuesArguments([]))
for t in exceptions
)
else:
raise ValueError("Should not happen.")
return types
def _apply_decorators(evaluator, context, node):
"""
Returns the function, that should to be executed in the end.
This is also the places where the decorators are processed.
"""
if node.type == 'classdef':
decoratee_context = er.ClassContext(
evaluator,
parent_context=context,
classdef=node
)
else:
decoratee_context = er.FunctionContext(
evaluator,
parent_context=context,
funcdef=node
)
initial = values = set([decoratee_context])
for dec in reversed(node.get_decorators()):
debug.dbg('decorator: %s %s', dec, values)
dec_values = context.eval_node(dec.children[1])
trailer_nodes = dec.children[2:-1]
if trailer_nodes:
# Create a trailer and evaluate it.
trailer = tree.PythonNode('trailer', trailer_nodes)
trailer.parent = dec
dec_values = evaluator.eval_trailer(context, dec_values, trailer)
if not len(dec_values):
debug.warning('decorator not found: %s on %s', dec, node)
return initial
values = unite(dec_value.execute(param.ValuesArguments([values]))
for dec_value in dec_values)
if not len(values):
debug.warning('not possible to resolve wrappers found %s', node)
return initial
debug.dbg('decorator end %s', values)
return values
def _remove_statements(evaluator, context, stmt, name):
"""
This is the part where statements are being stripped.
Due to lazy evaluation, statements like a = func; b = a; b() have to be
evaluated.
"""
types = set()
check_instance = None
pep0484types = \
pep0484.find_type_from_comment_hint_assign(context, stmt, name)
if pep0484types:
return pep0484types
types |= context.eval_stmt(stmt, seek_name=name)
if check_instance is not None:
# class renames
types = set([er.get_instance_el(evaluator, check_instance, a, True)
if isinstance(a, er.Function) else a for a in types])
return types
def _check_flow_information(context, flow, search_name, pos):
""" Try to find out the type of a variable just with the information that
is given by the flows: e.g. It is also responsible for assert checks.::
if isinstance(k, str):
k. # <- completion here
ensures that `k` is a string.
"""
if not settings.dynamic_flow_information:
return None
result = None
if is_scope(flow):
# Check for asserts.
module_node = flow.get_root_node()
try:
names = module_node.get_used_names()[search_name.value]
except KeyError:
return None
names = reversed([
n for n in names
if flow.start_pos <= n.start_pos < (pos or flow.end_pos)
])
for name in names:
ass = search_ancestor(name, 'assert_stmt')
if ass is not None:
result = _check_isinstance_type(context, ass.assertion, search_name)
if result is not None:
return result
if flow.type in ('if_stmt', 'while_stmt'):
potential_ifs = [c for c in flow.children[1::4] if c != ':']
for if_test in reversed(potential_ifs):
if search_name.start_pos > if_test.end_pos:
return _check_isinstance_type(context, if_test, search_name)
return result
def _check_isinstance_type(context, element, search_name):
try:
assert element.type in ('power', 'atom_expr')
# this might be removed if we analyze and, etc
assert len(element.children) == 2
first, trailer = element.children
assert first.type == 'name' and first.value == 'isinstance'
assert trailer.type == 'trailer' and trailer.children[0] == '('
assert len(trailer.children) == 3
# arglist stuff
arglist = trailer.children[1]
args = param.TreeArguments(context.evaluator, context, arglist, trailer)
param_list = list(args.unpack())
# Disallow keyword arguments
assert len(param_list) == 2
(key1, lazy_context_object), (key2, lazy_context_cls) = param_list
assert key1 is None and key2 is None
call = helpers.call_of_leaf(search_name)
is_instance_call = helpers.call_of_leaf(lazy_context_object.data)
# Do a simple get_code comparison. They should just have the same code,
# and everything will be all right.
normalize = context.evaluator.grammar._normalize
assert normalize(is_instance_call) == normalize(call)
except AssertionError:
return None
result = set()
for cls_or_tup in lazy_context_cls.infer():
if isinstance(cls_or_tup, iterable.AbstractSequence) and \
cls_or_tup.array_type == 'tuple':
for lazy_context in cls_or_tup.py__iter__():
for context in lazy_context.infer():
result |= context.execute_evaluated()
else:
result |= cls_or_tup.execute_evaluated()
return result
def check_tuple_assignments(evaluator, contextualized_name, types):
"""
Checks if tuples are assigned.
"""
lazy_context = None
for index, node in contextualized_name.assignment_indexes():
cn = ContextualizedNode(contextualized_name.context, node)
iterated = iterable.py__iter__(evaluator, types, cn)
for _ in range(index + 1):
try:
lazy_context = next(iterated)
except StopIteration:
# We could do this with the default param in next. But this
# would allow this loop to run for a very long time if the
# index number is high. Therefore break if the loop is
# finished.
return set()
types = lazy_context.infer()
return types

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from jedi.parser_utils import get_flow_branch_keyword, is_scope, get_parent_scope
class Status(object):
lookup_table = {}
def __init__(self, value, name):
self._value = value
self._name = name
Status.lookup_table[value] = self
def invert(self):
if self is REACHABLE:
return UNREACHABLE
elif self is UNREACHABLE:
return REACHABLE
else:
return UNSURE
def __and__(self, other):
if UNSURE in (self, other):
return UNSURE
else:
return REACHABLE if self._value and other._value else UNREACHABLE
def __repr__(self):
return '<%s: %s>' % (type(self).__name__, self._name)
REACHABLE = Status(True, 'reachable')
UNREACHABLE = Status(False, 'unreachable')
UNSURE = Status(None, 'unsure')
def _get_flow_scopes(node):
while True:
node = get_parent_scope(node, include_flows=True)
if node is None or is_scope(node):
return
yield node
def reachability_check(context, context_scope, node, origin_scope=None):
first_flow_scope = get_parent_scope(node, include_flows=True)
if origin_scope is not None:
origin_flow_scopes = list(_get_flow_scopes(origin_scope))
node_flow_scopes = list(_get_flow_scopes(node))
branch_matches = True
for flow_scope in origin_flow_scopes:
if flow_scope in node_flow_scopes:
node_keyword = get_flow_branch_keyword(flow_scope, node)
origin_keyword = get_flow_branch_keyword(flow_scope, origin_scope)
branch_matches = node_keyword == origin_keyword
if flow_scope.type == 'if_stmt':
if not branch_matches:
return UNREACHABLE
elif flow_scope.type == 'try_stmt':
if not branch_matches and origin_keyword == 'else' \
and node_keyword == 'except':
return UNREACHABLE
break
# Direct parents get resolved, we filter scopes that are separate
# branches. This makes sense for autocompletion and static analysis.
# For actual Python it doesn't matter, because we're talking about
# potentially unreachable code.
# e.g. `if 0:` would cause all name lookup within the flow make
# unaccessible. This is not a "problem" in Python, because the code is
# never called. In Jedi though, we still want to infer types.
while origin_scope is not None:
if first_flow_scope == origin_scope and branch_matches:
return REACHABLE
origin_scope = origin_scope.parent
return _break_check(context, context_scope, first_flow_scope, node)
def _break_check(context, context_scope, flow_scope, node):
reachable = REACHABLE
if flow_scope.type == 'if_stmt':
if flow_scope.is_node_after_else(node):
for check_node in flow_scope.get_test_nodes():
reachable = _check_if(context, check_node)
if reachable in (REACHABLE, UNSURE):
break
reachable = reachable.invert()
else:
flow_node = flow_scope.get_corresponding_test_node(node)
if flow_node is not None:
reachable = _check_if(context, flow_node)
elif flow_scope.type in ('try_stmt', 'while_stmt'):
return UNSURE
# Only reachable branches need to be examined further.
if reachable in (UNREACHABLE, UNSURE):
return reachable
if context_scope != flow_scope and context_scope != flow_scope.parent:
flow_scope = get_parent_scope(flow_scope, include_flows=True)
return reachable & _break_check(context, context_scope, flow_scope, node)
else:
return reachable
def _check_if(context, node):
types = context.eval_node(node)
values = set(x.py__bool__() for x in types)
if len(values) == 1:
return Status.lookup_table[values.pop()]
else:
return UNSURE

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import copy
import sys
import re
import os
from itertools import chain
from contextlib import contextmanager
from parso.python import tree
from jedi.parser_utils import get_parent_scope
def is_stdlib_path(path):
# Python standard library paths look like this:
# /usr/lib/python3.5/...
# TODO The implementation below is probably incorrect and not complete.
if 'dist-packages' in path or 'site-packages' in path:
return False
base_path = os.path.join(sys.prefix, 'lib', 'python')
return bool(re.match(re.escape(base_path) + '\d.\d', path))
def deep_ast_copy(obj):
"""
Much, much faster than copy.deepcopy, but just for parser tree nodes.
"""
# If it's already in the cache, just return it.
new_obj = copy.copy(obj)
# Copy children
new_children = []
for child in obj.children:
if isinstance(child, tree.Leaf):
new_child = copy.copy(child)
new_child.parent = new_obj
else:
new_child = deep_ast_copy(child)
new_child.parent = new_obj
new_children.append(new_child)
new_obj.children = new_children
return new_obj
def evaluate_call_of_leaf(context, leaf, cut_own_trailer=False):
"""
Creates a "call" node that consist of all ``trailer`` and ``power``
objects. E.g. if you call it with ``append``::
list([]).append(3) or None
You would get a node with the content ``list([]).append`` back.
This generates a copy of the original ast node.
If you're using the leaf, e.g. the bracket `)` it will return ``list([])``.
# TODO remove cut_own_trailer option, since its always used with it. Just
# ignore it, It's not what we want anyway. Or document it better?
"""
trailer = leaf.parent
# The leaf may not be the last or first child, because there exist three
# different trailers: `( x )`, `[ x ]` and `.x`. In the first two examples
# we should not match anything more than x.
if trailer.type != 'trailer' or leaf not in (trailer.children[0], trailer.children[-1]):
if trailer.type == 'atom':
return context.eval_node(trailer)
return context.eval_node(leaf)
power = trailer.parent
index = power.children.index(trailer)
if cut_own_trailer:
cut = index
else:
cut = index + 1
if power.type == 'error_node':
start = index
while True:
start -= 1
base = power.children[start]
if base.type != 'trailer':
break
trailers = power.children[start + 1: index + 1]
else:
base = power.children[0]
trailers = power.children[1:cut]
values = context.eval_node(base)
for trailer in trailers:
values = context.eval_trailer(values, trailer)
return values
def call_of_leaf(leaf):
"""
Creates a "call" node that consist of all ``trailer`` and ``power``
objects. E.g. if you call it with ``append``::
list([]).append(3) or None
You would get a node with the content ``list([]).append`` back.
This generates a copy of the original ast node.
If you're using the leaf, e.g. the bracket `)` it will return ``list([])``.
"""
# TODO this is the old version of this call. Try to remove it.
trailer = leaf.parent
# The leaf may not be the last or first child, because there exist three
# different trailers: `( x )`, `[ x ]` and `.x`. In the first two examples
# we should not match anything more than x.
if trailer.type != 'trailer' or leaf not in (trailer.children[0], trailer.children[-1]):
if trailer.type == 'atom':
return trailer
return leaf
power = trailer.parent
index = power.children.index(trailer)
new_power = copy.copy(power)
new_power.children = list(new_power.children)
new_power.children[index + 1:] = []
if power.type == 'error_node':
start = index
while True:
start -= 1
if power.children[start].type != 'trailer':
break
transformed = tree.Node('power', power.children[start:])
transformed.parent = power.parent
return transformed
return power
def get_names_of_node(node):
try:
children = node.children
except AttributeError:
if node.type == 'name':
return [node]
else:
return []
else:
return list(chain.from_iterable(get_names_of_node(c) for c in children))
def get_module_names(module, all_scopes):
"""
Returns a dictionary with name parts as keys and their call paths as
values.
"""
names = chain.from_iterable(module.get_used_names().values())
if not all_scopes:
# We have to filter all the names that don't have the module as a
# parent_scope. There's None as a parent, because nodes in the module
# node have the parent module and not suite as all the others.
# Therefore it's important to catch that case.
names = [n for n in names if get_parent_scope(n).parent in (module, None)]
return names
@contextmanager
def predefine_names(context, flow_scope, dct):
predefined = context.predefined_names
if flow_scope in predefined:
raise NotImplementedError('Why does this happen?')
predefined[flow_scope] = dct
try:
yield
finally:
del predefined[flow_scope]

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"""
:mod:`jedi.evaluate.imports` is here to resolve import statements and return
the modules/classes/functions/whatever, which they stand for. However there's
not any actual importing done. This module is about finding modules in the
filesystem. This can be quite tricky sometimes, because Python imports are not
always that simple.
This module uses imp for python up to 3.2 and importlib for python 3.3 on; the
correct implementation is delegated to _compatibility.
This module also supports import autocompletion, which means to complete
statements like ``from datetim`` (curser at the end would return ``datetime``).
"""
import imp
import os
import pkgutil
import sys
from parso.python import tree
from parso.tree import search_ancestor
from parso.cache import parser_cache
from parso import python_bytes_to_unicode
from jedi._compatibility import find_module, unicode, ImplicitNSInfo
from jedi import debug
from jedi import settings
from jedi.common import unite
from jedi.evaluate import sys_path
from jedi.evaluate import helpers
from jedi.evaluate import compiled
from jedi.evaluate import analysis
from jedi.evaluate.cache import evaluator_method_cache
from jedi.evaluate.filters import AbstractNameDefinition
# This memoization is needed, because otherwise we will infinitely loop on
# certain imports.
@evaluator_method_cache(default=set())
def infer_import(context, tree_name, is_goto=False):
module_context = context.get_root_context()
import_node = search_ancestor(tree_name, 'import_name', 'import_from')
import_path = import_node.get_path_for_name(tree_name)
from_import_name = None
evaluator = context.evaluator
try:
from_names = import_node.get_from_names()
except AttributeError:
# Is an import_name
pass
else:
if len(from_names) + 1 == len(import_path):
# We have to fetch the from_names part first and then check
# if from_names exists in the modules.
from_import_name = import_path[-1]
import_path = from_names
importer = Importer(evaluator, tuple(import_path),
module_context, import_node.level)
types = importer.follow()
#if import_node.is_nested() and not self.nested_resolve:
# scopes = [NestedImportModule(module, import_node)]
if not types:
return set()
if from_import_name is not None:
types = unite(
t.py__getattribute__(
from_import_name,
name_context=context,
is_goto=is_goto,
analysis_errors=False
) for t in types
)
if not types:
path = import_path + [from_import_name]
importer = Importer(evaluator, tuple(path),
module_context, import_node.level)
types = importer.follow()
# goto only accepts `Name`
if is_goto:
types = set(s.name for s in types)
else:
# goto only accepts `Name`
if is_goto:
types = set(s.name for s in types)
debug.dbg('after import: %s', types)
return types
class NestedImportModule(tree.Module):
"""
TODO while there's no use case for nested import module right now, we might
be able to use them for static analysis checks later on.
"""
def __init__(self, module, nested_import):
self._module = module
self._nested_import = nested_import
def _get_nested_import_name(self):
"""
Generates an Import statement, that can be used to fake nested imports.
"""
i = self._nested_import
# This is not an existing Import statement. Therefore, set position to
# 0 (0 is not a valid line number).
zero = (0, 0)
names = [unicode(name) for name in i.namespace_names[1:]]
name = helpers.FakeName(names, self._nested_import)
new = tree.Import(i._sub_module, zero, zero, name)
new.parent = self._module
debug.dbg('Generated a nested import: %s', new)
return helpers.FakeName(str(i.namespace_names[1]), new)
def __getattr__(self, name):
return getattr(self._module, name)
def __repr__(self):
return "<%s: %s of %s>" % (self.__class__.__name__, self._module,
self._nested_import)
def _add_error(context, name, message=None):
# Should be a name, not a string!
if hasattr(name, 'parent'):
analysis.add(context, 'import-error', name, message)
def get_init_path(directory_path):
"""
The __init__ file can be searched in a directory. If found return it, else
None.
"""
for suffix, _, _ in imp.get_suffixes():
path = os.path.join(directory_path, '__init__' + suffix)
if os.path.exists(path):
return path
return None
class ImportName(AbstractNameDefinition):
start_pos = (1, 0)
_level = 0
def __init__(self, parent_context, string_name):
self.parent_context = parent_context
self.string_name = string_name
def infer(self):
return Importer(
self.parent_context.evaluator,
[self.string_name],
self.parent_context,
level=self._level,
).follow()
def goto(self):
return [m.name for m in self.infer()]
def get_root_context(self):
# Not sure if this is correct.
return self.parent_context.get_root_context()
@property
def api_type(self):
return 'module'
class SubModuleName(ImportName):
_level = 1
class Importer(object):
def __init__(self, evaluator, import_path, module_context, level=0):
"""
An implementation similar to ``__import__``. Use `follow`
to actually follow the imports.
*level* specifies whether to use absolute or relative imports. 0 (the
default) means only perform absolute imports. Positive values for level
indicate the number of parent directories to search relative to the
directory of the module calling ``__import__()`` (see PEP 328 for the
details).
:param import_path: List of namespaces (strings or Names).
"""
debug.speed('import %s' % (import_path,))
self._evaluator = evaluator
self.level = level
self.module_context = module_context
try:
self.file_path = module_context.py__file__()
except AttributeError:
# Can be None for certain compiled modules like 'builtins'.
self.file_path = None
if level:
base = module_context.py__package__().split('.')
if base == ['']:
base = []
if level > len(base):
path = module_context.py__file__()
if path is not None:
import_path = list(import_path)
p = path
for i in range(level):
p = os.path.dirname(p)
dir_name = os.path.basename(p)
# This is not the proper way to do relative imports. However, since
# Jedi cannot be sure about the entry point, we just calculate an
# absolute path here.
if dir_name:
# TODO those sys.modules modifications are getting
# really stupid. this is the 3rd time that we're using
# this. We should probably refactor.
if path.endswith(os.path.sep + 'os.py'):
import_path.insert(0, 'os')
else:
import_path.insert(0, dir_name)
else:
_add_error(module_context, import_path[-1])
import_path = []
# TODO add import error.
debug.warning('Attempted relative import beyond top-level package.')
# If no path is defined in the module we have no ideas where we
# are in the file system. Therefore we cannot know what to do.
# In this case we just let the path there and ignore that it's
# a relative path. Not sure if that's a good idea.
else:
# Here we basically rewrite the level to 0.
base = tuple(base)
if level > 1:
base = base[:-level + 1]
import_path = base + tuple(import_path)
self.import_path = import_path
@property
def str_import_path(self):
"""Returns the import path as pure strings instead of `Name`."""
return tuple(
name.value if isinstance(name, tree.Name) else name
for name in self.import_path)
def sys_path_with_modifications(self):
in_path = []
sys_path_mod = list(sys_path.sys_path_with_modifications(
self._evaluator,
self.module_context
))
if self.file_path is not None:
# If you edit e.g. gunicorn, there will be imports like this:
# `from gunicorn import something`. But gunicorn is not in the
# sys.path. Therefore look if gunicorn is a parent directory, #56.
if self.import_path: # TODO is this check really needed?
for path in sys_path.traverse_parents(self.file_path):
if os.path.basename(path) == self.str_import_path[0]:
in_path.append(os.path.dirname(path))
# Since we know nothing about the call location of the sys.path,
# it's a possibility that the current directory is the origin of
# the Python execution.
sys_path_mod.insert(0, os.path.dirname(self.file_path))
return in_path + sys_path_mod
def follow(self):
if not self.import_path:
return set()
return self._do_import(self.import_path, self.sys_path_with_modifications())
def _do_import(self, import_path, sys_path):
"""
This method is very similar to importlib's `_gcd_import`.
"""
import_parts = [
i.value if isinstance(i, tree.Name) else i
for i in import_path
]
# Handle "magic" Flask extension imports:
# ``flask.ext.foo`` is really ``flask_foo`` or ``flaskext.foo``.
if len(import_path) > 2 and import_parts[:2] == ['flask', 'ext']:
# New style.
ipath = ('flask_' + str(import_parts[2]),) + import_path[3:]
modules = self._do_import(ipath, sys_path)
if modules:
return modules
else:
# Old style
return self._do_import(('flaskext',) + import_path[2:], sys_path)
module_name = '.'.join(import_parts)
try:
return set([self._evaluator.modules[module_name]])
except KeyError:
pass
if len(import_path) > 1:
# This is a recursive way of importing that works great with
# the module cache.
bases = self._do_import(import_path[:-1], sys_path)
if not bases:
return set()
# We can take the first element, because only the os special
# case yields multiple modules, which is not important for
# further imports.
parent_module = list(bases)[0]
# This is a huge exception, we follow a nested import
# ``os.path``, because it's a very important one in Python
# that is being achieved by messing with ``sys.modules`` in
# ``os``.
if import_parts == ['os', 'path']:
return parent_module.py__getattribute__('path')
try:
method = parent_module.py__path__
except AttributeError:
# The module is not a package.
_add_error(self.module_context, import_path[-1])
return set()
else:
paths = method()
debug.dbg('search_module %s in paths %s', module_name, paths)
for path in paths:
# At the moment we are only using one path. So this is
# not important to be correct.
try:
if not isinstance(path, list):
path = [path]
module_file, module_path, is_pkg = \
find_module(import_parts[-1], path, fullname=module_name)
break
except ImportError:
module_path = None
if module_path is None:
_add_error(self.module_context, import_path[-1])
return set()
else:
parent_module = None
try:
debug.dbg('search_module %s in %s', import_parts[-1], self.file_path)
# Override the sys.path. It works only good that way.
# Injecting the path directly into `find_module` did not work.
sys.path, temp = sys_path, sys.path
try:
module_file, module_path, is_pkg = \
find_module(import_parts[-1], fullname=module_name)
finally:
sys.path = temp
except ImportError:
# The module is not a package.
_add_error(self.module_context, import_path[-1])
return set()
code = None
if is_pkg:
# In this case, we don't have a file yet. Search for the
# __init__ file.
if module_path.endswith(('.zip', '.egg')):
code = module_file.loader.get_source(module_name)
else:
module_path = get_init_path(module_path)
elif module_file:
code = module_file.read()
module_file.close()
if isinstance(module_path, ImplicitNSInfo):
from jedi.evaluate.representation import ImplicitNamespaceContext
fullname, paths = module_path.name, module_path.paths
module = ImplicitNamespaceContext(self._evaluator, fullname=fullname)
module.paths = paths
elif module_file is None and not module_path.endswith(('.py', '.zip', '.egg')):
module = compiled.load_module(self._evaluator, module_path)
else:
module = _load_module(self._evaluator, module_path, code, sys_path, parent_module)
if module is None:
# The file might raise an ImportError e.g. and therefore not be
# importable.
return set()
self._evaluator.modules[module_name] = module
return set([module])
def _generate_name(self, name, in_module=None):
# Create a pseudo import to be able to follow them.
if in_module is None:
return ImportName(self.module_context, name)
return SubModuleName(in_module, name)
def _get_module_names(self, search_path=None, in_module=None):
"""
Get the names of all modules in the search_path. This means file names
and not names defined in the files.
"""
names = []
# add builtin module names
if search_path is None and in_module is None:
names += [self._generate_name(name) for name in sys.builtin_module_names]
if search_path is None:
search_path = self.sys_path_with_modifications()
for module_loader, name, is_pkg in pkgutil.iter_modules(search_path):
names.append(self._generate_name(name, in_module=in_module))
return names
def completion_names(self, evaluator, only_modules=False):
"""
:param only_modules: Indicates wheter it's possible to import a
definition that is not defined in a module.
"""
from jedi.evaluate.representation import ModuleContext, ImplicitNamespaceContext
names = []
if self.import_path:
# flask
if self.str_import_path == ('flask', 'ext'):
# List Flask extensions like ``flask_foo``
for mod in self._get_module_names():
modname = mod.string_name
if modname.startswith('flask_'):
extname = modname[len('flask_'):]
names.append(self._generate_name(extname))
# Now the old style: ``flaskext.foo``
for dir in self.sys_path_with_modifications():
flaskext = os.path.join(dir, 'flaskext')
if os.path.isdir(flaskext):
names += self._get_module_names([flaskext])
for context in self.follow():
# Non-modules are not completable.
if context.api_type != 'module': # not a module
continue
# namespace packages
if isinstance(context, ModuleContext) and context.py__file__().endswith('__init__.py'):
paths = context.py__path__()
names += self._get_module_names(paths, in_module=context)
# implicit namespace packages
elif isinstance(context, ImplicitNamespaceContext):
paths = context.paths
names += self._get_module_names(paths)
if only_modules:
# In the case of an import like `from x.` we don't need to
# add all the variables.
if ('os',) == self.str_import_path and not self.level:
# os.path is a hardcoded exception, because it's a
# ``sys.modules`` modification.
names.append(self._generate_name('path', context))
continue
for filter in context.get_filters(search_global=False):
names += filter.values()
else:
# Empty import path=completion after import
if not self.level:
names += self._get_module_names()
if self.file_path is not None:
path = os.path.abspath(self.file_path)
for i in range(self.level - 1):
path = os.path.dirname(path)
names += self._get_module_names([path])
return names
def _load_module(evaluator, path=None, code=None, sys_path=None, parent_module=None):
if sys_path is None:
sys_path = evaluator.sys_path
dotted_path = path and compiled.dotted_from_fs_path(path, sys_path)
if path is not None and path.endswith(('.py', '.zip', '.egg')) \
and dotted_path not in settings.auto_import_modules:
module_node = evaluator.grammar.parse(
code=code, path=path, cache=True, diff_cache=True,
cache_path=settings.cache_directory)
from jedi.evaluate.representation import ModuleContext
return ModuleContext(evaluator, module_node, path=path)
else:
return compiled.load_module(evaluator, path)
def add_module(evaluator, module_name, module):
if '.' not in module_name:
# We cannot add paths with dots, because that would collide with
# the sepatator dots for nested packages. Therefore we return
# `__main__` in ModuleWrapper.py__name__(), which is similar to
# Python behavior.
evaluator.modules[module_name] = module
def get_modules_containing_name(evaluator, modules, name):
"""
Search a name in the directories of modules.
"""
from jedi.evaluate import representation as er
def check_python_file(path):
try:
# TODO I don't think we should use the cache here?!
node_cache_item = parser_cache[evaluator.grammar._hashed][path]
except KeyError:
try:
return check_fs(path)
except IOError:
return None
else:
module_node = node_cache_item.node
return er.ModuleContext(evaluator, module_node, path=path)
def check_fs(path):
with open(path, 'rb') as f:
code = python_bytes_to_unicode(f.read(), errors='replace')
if name in code:
module = _load_module(evaluator, path, code)
module_name = sys_path.dotted_path_in_sys_path(evaluator.sys_path, path)
if module_name is not None:
add_module(evaluator, module_name, module)
return module
# skip non python modules
used_mod_paths = set()
for m in modules:
try:
path = m.py__file__()
except AttributeError:
pass
else:
used_mod_paths.add(path)
yield m
if not settings.dynamic_params_for_other_modules:
return
paths = set(settings.additional_dynamic_modules)
for p in used_mod_paths:
if p is not None:
# We need abspath, because the seetings paths might not already
# have been converted to absolute paths.
d = os.path.dirname(os.path.abspath(p))
for file_name in os.listdir(d):
path = os.path.join(d, file_name)
if path not in used_mod_paths and path not in paths:
if file_name.endswith('.py'):
paths.add(path)
# Sort here to make issues less random.
for p in sorted(paths):
# make testing easier, sort it - same results on every interpreter
m = check_python_file(p)
if m is not None and not isinstance(m, compiled.CompiledObject):
yield m

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from abc import abstractproperty
from jedi._compatibility import is_py3
from jedi.common import unite
from jedi import debug
from jedi.evaluate import compiled
from jedi.evaluate import filters
from jedi.evaluate.context import Context, LazyKnownContext, LazyKnownContexts
from jedi.evaluate.cache import evaluator_method_cache
from jedi.evaluate.param import AbstractArguments, AnonymousArguments
from jedi.cache import memoize_method
from jedi.evaluate import representation as er
from jedi.evaluate import iterable
from jedi.parser_utils import get_parent_scope
class InstanceFunctionExecution(er.FunctionExecutionContext):
def __init__(self, instance, parent_context, function_context, var_args):
self.instance = instance
var_args = InstanceVarArgs(self, var_args)
super(InstanceFunctionExecution, self).__init__(
instance.evaluator, parent_context, function_context, var_args)
class AnonymousInstanceFunctionExecution(er.FunctionExecutionContext):
function_execution_filter = filters.AnonymousInstanceFunctionExecutionFilter
def __init__(self, instance, parent_context, function_context, var_args):
self.instance = instance
super(AnonymousInstanceFunctionExecution, self).__init__(
instance.evaluator, parent_context, function_context, var_args)
class AbstractInstanceContext(Context):
"""
This class is used to evaluate instances.
"""
api_type = 'instance'
function_execution_cls = InstanceFunctionExecution
def __init__(self, evaluator, parent_context, class_context, var_args):
super(AbstractInstanceContext, self).__init__(evaluator, parent_context)
# Generated instances are classes that are just generated by self
# (No var_args) used.
self.class_context = class_context
self.var_args = var_args
def is_class(self):
return False
@property
def py__call__(self):
names = self.get_function_slot_names('__call__')
if not names:
# Means the Instance is not callable.
raise AttributeError
def execute(arguments):
return unite(name.execute(arguments) for name in names)
return execute
def py__class__(self):
return self.class_context
def py__bool__(self):
# Signalize that we don't know about the bool type.
return None
def get_function_slot_names(self, name):
# Python classes don't look at the dictionary of the instance when
# looking up `__call__`. This is something that has to do with Python's
# internal slot system (note: not __slots__, but C slots).
for filter in self.get_filters(include_self_names=False):
names = filter.get(name)
if names:
return names
return []
def execute_function_slots(self, names, *evaluated_args):
return unite(
name.execute_evaluated(*evaluated_args)
for name in names
)
def py__get__(self, obj):
# Arguments in __get__ descriptors are obj, class.
# `method` is the new parent of the array, don't know if that's good.
names = self.get_function_slot_names('__get__')
if names:
if isinstance(obj, AbstractInstanceContext):
return self.execute_function_slots(names, obj, obj.class_context)
else:
none_obj = compiled.create(self.evaluator, None)
return self.execute_function_slots(names, none_obj, obj)
else:
return set([self])
def get_filters(self, search_global=None, until_position=None,
origin_scope=None, include_self_names=True):
if include_self_names:
for cls in self.class_context.py__mro__():
if isinstance(cls, compiled.CompiledObject):
if cls.tree_node is not None:
# In this case we're talking about a fake object, it
# doesn't make sense for normal compiled objects to
# search for self variables.
yield SelfNameFilter(self.evaluator, self, cls, origin_scope)
else:
yield SelfNameFilter(self.evaluator, self, cls, origin_scope)
for cls in self.class_context.py__mro__():
if isinstance(cls, compiled.CompiledObject):
yield CompiledInstanceClassFilter(self.evaluator, self, cls)
else:
yield InstanceClassFilter(self.evaluator, self, cls, origin_scope)
def py__getitem__(self, index):
try:
names = self.get_function_slot_names('__getitem__')
except KeyError:
debug.warning('No __getitem__, cannot access the array.')
return set()
else:
index_obj = compiled.create(self.evaluator, index)
return self.execute_function_slots(names, index_obj)
def py__iter__(self):
iter_slot_names = self.get_function_slot_names('__iter__')
if not iter_slot_names:
debug.warning('No __iter__ on %s.' % self)
return
for generator in self.execute_function_slots(iter_slot_names):
if isinstance(generator, AbstractInstanceContext):
# `__next__` logic.
name = '__next__' if is_py3 else 'next'
iter_slot_names = generator.get_function_slot_names(name)
if iter_slot_names:
yield LazyKnownContexts(
generator.execute_function_slots(iter_slot_names)
)
else:
debug.warning('Instance has no __next__ function in %s.', generator)
else:
for lazy_context in generator.py__iter__():
yield lazy_context
@abstractproperty
def name(self):
pass
def _create_init_execution(self, class_context, func_node):
bound_method = BoundMethod(
self.evaluator, self, class_context, self.parent_context, func_node
)
return self.function_execution_cls(
self,
class_context.parent_context,
bound_method,
self.var_args
)
def create_init_executions(self):
for name in self.get_function_slot_names('__init__'):
if isinstance(name, LazyInstanceName):
yield self._create_init_execution(name.class_context, name.tree_name.parent)
@evaluator_method_cache()
def create_instance_context(self, class_context, node):
if node.parent.type in ('funcdef', 'classdef'):
node = node.parent
scope = get_parent_scope(node)
if scope == class_context.tree_node:
return class_context
else:
parent_context = self.create_instance_context(class_context, scope)
if scope.type == 'funcdef':
if scope.name.value == '__init__' and parent_context == class_context:
return self._create_init_execution(class_context, scope)
else:
bound_method = BoundMethod(
self.evaluator, self, class_context,
parent_context, scope
)
return bound_method.get_function_execution()
elif scope.type == 'classdef':
class_context = er.ClassContext(self.evaluator, scope, parent_context)
return class_context
elif scope.type == 'comp_for':
# Comprehensions currently don't have a special scope in Jedi.
return self.create_instance_context(class_context, scope)
else:
raise NotImplementedError
return class_context
def __repr__(self):
return "<%s of %s(%s)>" % (self.__class__.__name__, self.class_context,
self.var_args)
class CompiledInstance(AbstractInstanceContext):
def __init__(self, *args, **kwargs):
super(CompiledInstance, self).__init__(*args, **kwargs)
# I don't think that dynamic append lookups should happen here. That
# sounds more like something that should go to py__iter__.
if self.class_context.name.string_name in ['list', 'set'] \
and self.parent_context.get_root_context() == self.evaluator.BUILTINS:
# compare the module path with the builtin name.
self.var_args = iterable.get_dynamic_array_instance(self)
@property
def name(self):
return compiled.CompiledContextName(self, self.class_context.name.string_name)
def create_instance_context(self, class_context, node):
if get_parent_scope(node).type == 'classdef':
return class_context
else:
return super(CompiledInstance, self).create_instance_context(class_context, node)
class TreeInstance(AbstractInstanceContext):
def __init__(self, evaluator, parent_context, class_context, var_args):
super(TreeInstance, self).__init__(evaluator, parent_context,
class_context, var_args)
self.tree_node = class_context.tree_node
@property
def name(self):
return filters.ContextName(self, self.class_context.name.tree_name)
class AnonymousInstance(TreeInstance):
function_execution_cls = AnonymousInstanceFunctionExecution
def __init__(self, evaluator, parent_context, class_context):
super(AnonymousInstance, self).__init__(
evaluator,
parent_context,
class_context,
var_args=AnonymousArguments(),
)
class CompiledInstanceName(compiled.CompiledName):
def __init__(self, evaluator, instance, parent_context, name):
super(CompiledInstanceName, self).__init__(evaluator, parent_context, name)
self._instance = instance
def infer(self):
for result_context in super(CompiledInstanceName, self).infer():
if isinstance(result_context, er.FunctionContext):
parent_context = result_context.parent_context
while parent_context.is_class():
parent_context = parent_context.parent_context
yield BoundMethod(
result_context.evaluator, self._instance, self.parent_context,
parent_context, result_context.tree_node
)
else:
if result_context.api_type == 'function':
yield CompiledBoundMethod(result_context)
else:
yield result_context
class CompiledInstanceClassFilter(compiled.CompiledObjectFilter):
name_class = CompiledInstanceName
def __init__(self, evaluator, instance, compiled_object):
super(CompiledInstanceClassFilter, self).__init__(
evaluator,
compiled_object,
is_instance=True,
)
self._instance = instance
def _create_name(self, name):
return self.name_class(
self._evaluator, self._instance, self._compiled_object, name)
class BoundMethod(er.FunctionContext):
def __init__(self, evaluator, instance, class_context, *args, **kwargs):
super(BoundMethod, self).__init__(evaluator, *args, **kwargs)
self._instance = instance
self._class_context = class_context
def get_function_execution(self, arguments=None):
if arguments is None:
arguments = AnonymousArguments()
return AnonymousInstanceFunctionExecution(
self._instance, self.parent_context, self, arguments)
else:
return InstanceFunctionExecution(
self._instance, self.parent_context, self, arguments)
class CompiledBoundMethod(compiled.CompiledObject):
def __init__(self, func):
super(CompiledBoundMethod, self).__init__(
func.evaluator, func.obj, func.parent_context, func.tree_node)
def get_param_names(self):
return list(super(CompiledBoundMethod, self).get_param_names())[1:]
class InstanceNameDefinition(filters.TreeNameDefinition):
def infer(self):
contexts = super(InstanceNameDefinition, self).infer()
for context in contexts:
yield context
class LazyInstanceName(filters.TreeNameDefinition):
"""
This name calculates the parent_context lazily.
"""
def __init__(self, instance, class_context, tree_name):
self._instance = instance
self.class_context = class_context
self.tree_name = tree_name
@property
def parent_context(self):
return self._instance.create_instance_context(self.class_context, self.tree_name)
class LazyInstanceClassName(LazyInstanceName):
def infer(self):
for result_context in super(LazyInstanceClassName, self).infer():
if isinstance(result_context, er.FunctionContext):
# Classes are never used to resolve anything within the
# functions. Only other functions and modules will resolve
# those things.
parent_context = result_context.parent_context
while parent_context.is_class():
parent_context = parent_context.parent_context
yield BoundMethod(
result_context.evaluator, self._instance, self.class_context,
parent_context, result_context.tree_node
)
else:
for c in er.apply_py__get__(result_context, self._instance):
yield c
class InstanceClassFilter(filters.ParserTreeFilter):
name_class = LazyInstanceClassName
def __init__(self, evaluator, context, class_context, origin_scope):
super(InstanceClassFilter, self).__init__(
evaluator=evaluator,
context=context,
node_context=class_context,
origin_scope=origin_scope
)
self._class_context = class_context
def _equals_origin_scope(self):
node = self._origin_scope
while node is not None:
if node == self._parser_scope or node == self.context:
return True
node = get_parent_scope(node)
return False
def _access_possible(self, name):
return not name.value.startswith('__') or name.value.endswith('__') \
or self._equals_origin_scope()
def _filter(self, names):
names = super(InstanceClassFilter, self)._filter(names)
return [name for name in names if self._access_possible(name)]
def _convert_names(self, names):
return [self.name_class(self.context, self._class_context, name) for name in names]
class SelfNameFilter(InstanceClassFilter):
name_class = LazyInstanceName
def _filter(self, names):
names = self._filter_self_names(names)
if isinstance(self._parser_scope, compiled.CompiledObject) and False:
# This would be for builtin skeletons, which are not yet supported.
return list(names)
else:
start, end = self._parser_scope.start_pos, self._parser_scope.end_pos
return [n for n in names if start < n.start_pos < end]
def _filter_self_names(self, names):
for name in names:
trailer = name.parent
if trailer.type == 'trailer' \
and len(trailer.children) == 2 \
and trailer.children[0] == '.':
if name.is_definition() and self._access_possible(name):
yield name
def _check_flows(self, names):
return names
class InstanceVarArgs(AbstractArguments):
def __init__(self, execution_context, var_args):
self._execution_context = execution_context
self._var_args = var_args
@memoize_method
def _get_var_args(self):
return self._var_args
@property
def argument_node(self):
return self._var_args.argument_node
@property
def trailer(self):
return self._var_args.trailer
def unpack(self, func=None):
yield None, LazyKnownContext(self._execution_context.instance)
for values in self._get_var_args().unpack(func):
yield values
def get_calling_nodes(self):
return self._get_var_args().get_calling_nodes()

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"""
Contains all classes and functions to deal with lists, dicts, generators and
iterators in general.
Array modifications
*******************
If the content of an array (``set``/``list``) is requested somewhere, the
current module will be checked for appearances of ``arr.append``,
``arr.insert``, etc. If the ``arr`` name points to an actual array, the
content will be added
This can be really cpu intensive, as you can imagine. Because |jedi| has to
follow **every** ``append`` and check wheter it's the right array. However this
works pretty good, because in *slow* cases, the recursion detector and other
settings will stop this process.
It is important to note that:
1. Array modfications work only in the current module.
2. Jedi only checks Array additions; ``list.pop``, etc are ignored.
"""
from jedi import debug
from jedi import settings
from jedi import common
from jedi.common import unite, safe_property
from jedi._compatibility import unicode, zip_longest, is_py3
from jedi.evaluate import compiled
from jedi.evaluate import helpers
from jedi.evaluate import analysis
from jedi.evaluate import pep0484
from jedi.evaluate import context
from jedi.evaluate import precedence
from jedi.evaluate import recursion
from jedi.evaluate.cache import evaluator_method_cache
from jedi.evaluate.filters import DictFilter, AbstractNameDefinition, \
ParserTreeFilter
from jedi.parser_utils import get_comp_fors
class AbstractSequence(context.Context):
builtin_methods = {}
api_type = 'instance'
def __init__(self, evaluator):
super(AbstractSequence, self).__init__(evaluator, evaluator.BUILTINS)
def get_filters(self, search_global, until_position=None, origin_scope=None):
raise NotImplementedError
@property
def name(self):
return compiled.CompiledContextName(self, self.array_type)
class BuiltinMethod(object):
"""``Generator.__next__`` ``dict.values`` methods and so on."""
def __init__(self, builtin_context, method, builtin_func):
self._builtin_context = builtin_context
self._method = method
self._builtin_func = builtin_func
def py__call__(self, params):
return self._method(self._builtin_context)
def __getattr__(self, name):
return getattr(self._builtin_func, name)
class SpecialMethodFilter(DictFilter):
"""
A filter for methods that are defined in this module on the corresponding
classes like Generator (for __next__, etc).
"""
class SpecialMethodName(AbstractNameDefinition):
api_type = 'function'
def __init__(self, parent_context, string_name, callable_, builtin_context):
self.parent_context = parent_context
self.string_name = string_name
self._callable = callable_
self._builtin_context = builtin_context
def infer(self):
filter = next(self._builtin_context.get_filters())
# We can take the first index, because on builtin methods there's
# always only going to be one name. The same is true for the
# inferred values.
builtin_func = next(iter(filter.get(self.string_name)[0].infer()))
return set([BuiltinMethod(self.parent_context, self._callable, builtin_func)])
def __init__(self, context, dct, builtin_context):
super(SpecialMethodFilter, self).__init__(dct)
self.context = context
self._builtin_context = builtin_context
"""
This context is what will be used to introspect the name, where as the
other context will be used to execute the function.
We distinguish, because we have to.
"""
def _convert(self, name, value):
return self.SpecialMethodName(self.context, name, value, self._builtin_context)
def has_builtin_methods(cls):
base_dct = {}
# Need to care properly about inheritance. Builtin Methods should not get
# lost, just because they are not mentioned in a class.
for base_cls in reversed(cls.__bases__):
try:
base_dct.update(base_cls.builtin_methods)
except AttributeError:
pass
cls.builtin_methods = base_dct
for func in cls.__dict__.values():
try:
cls.builtin_methods.update(func.registered_builtin_methods)
except AttributeError:
pass
return cls
def register_builtin_method(method_name, python_version_match=None):
def wrapper(func):
if python_version_match and python_version_match != 2 + int(is_py3):
# Some functions do only apply to certain versions.
return func
dct = func.__dict__.setdefault('registered_builtin_methods', {})
dct[method_name] = func
return func
return wrapper
@has_builtin_methods
class GeneratorMixin(object):
array_type = None
@register_builtin_method('send')
@register_builtin_method('next', python_version_match=2)
@register_builtin_method('__next__', python_version_match=3)
def py__next__(self):
# TODO add TypeError if params are given.
return unite(lazy_context.infer() for lazy_context in self.py__iter__())
def get_filters(self, search_global, until_position=None, origin_scope=None):
gen_obj = compiled.get_special_object(self.evaluator, 'GENERATOR_OBJECT')
yield SpecialMethodFilter(self, self.builtin_methods, gen_obj)
for filter in gen_obj.get_filters(search_global):
yield filter
def py__bool__(self):
return True
def py__class__(self):
gen_obj = compiled.get_special_object(self.evaluator, 'GENERATOR_OBJECT')
return gen_obj.py__class__()
@property
def name(self):
return compiled.CompiledContextName(self, 'generator')
class Generator(GeneratorMixin, context.Context):
"""Handling of `yield` functions."""
def __init__(self, evaluator, func_execution_context):
super(Generator, self).__init__(evaluator, parent_context=evaluator.BUILTINS)
self._func_execution_context = func_execution_context
def py__iter__(self):
return self._func_execution_context.get_yield_values()
def __repr__(self):
return "<%s of %s>" % (type(self).__name__, self._func_execution_context)
class CompForContext(context.TreeContext):
@classmethod
def from_comp_for(cls, parent_context, comp_for):
return cls(parent_context.evaluator, parent_context, comp_for)
def __init__(self, evaluator, parent_context, comp_for):
super(CompForContext, self).__init__(evaluator, parent_context)
self.tree_node = comp_for
def get_node(self):
return self.tree_node
def get_filters(self, search_global, until_position=None, origin_scope=None):
yield ParserTreeFilter(self.evaluator, self)
class Comprehension(AbstractSequence):
@staticmethod
def from_atom(evaluator, context, atom):
bracket = atom.children[0]
if bracket == '{':
if atom.children[1].children[1] == ':':
cls = DictComprehension
else:
cls = SetComprehension
elif bracket == '(':
cls = GeneratorComprehension
elif bracket == '[':
cls = ListComprehension
return cls(evaluator, context, atom)
def __init__(self, evaluator, defining_context, atom):
super(Comprehension, self).__init__(evaluator)
self._defining_context = defining_context
self._atom = atom
def _get_comprehension(self):
# The atom contains a testlist_comp
return self._atom.children[1]
def _get_comp_for(self):
# The atom contains a testlist_comp
return self._get_comprehension().children[1]
def _eval_node(self, index=0):
"""
The first part `x + 1` of the list comprehension:
[x + 1 for x in foo]
"""
return self._get_comprehension().children[index]
@evaluator_method_cache()
def _get_comp_for_context(self, parent_context, comp_for):
# TODO shouldn't this be part of create_context?
return CompForContext.from_comp_for(parent_context, comp_for)
def _nested(self, comp_fors, parent_context=None):
evaluator = self.evaluator
comp_for = comp_fors[0]
input_node = comp_for.children[3]
parent_context = parent_context or self._defining_context
input_types = parent_context.eval_node(input_node)
cn = context.ContextualizedNode(parent_context, input_node)
iterated = py__iter__(evaluator, input_types, cn)
exprlist = comp_for.children[1]
for i, lazy_context in enumerate(iterated):
types = lazy_context.infer()
dct = unpack_tuple_to_dict(parent_context, types, exprlist)
context_ = self._get_comp_for_context(
parent_context,
comp_for,
)
with helpers.predefine_names(context_, comp_for, dct):
try:
for result in self._nested(comp_fors[1:], context_):
yield result
except IndexError:
iterated = context_.eval_node(self._eval_node())
if self.array_type == 'dict':
yield iterated, context_.eval_node(self._eval_node(2))
else:
yield iterated
@evaluator_method_cache(default=[])
@common.to_list
def _iterate(self):
comp_fors = tuple(get_comp_fors(self._get_comp_for()))
for result in self._nested(comp_fors):
yield result
def py__iter__(self):
for set_ in self._iterate():
yield context.LazyKnownContexts(set_)
def __repr__(self):
return "<%s of %s>" % (type(self).__name__, self._atom)
class ArrayMixin(object):
def get_filters(self, search_global, until_position=None, origin_scope=None):
# `array.type` is a string with the type, e.g. 'list'.
compiled_obj = compiled.builtin_from_name(self.evaluator, self.array_type)
yield SpecialMethodFilter(self, self.builtin_methods, compiled_obj)
for typ in compiled_obj.execute_evaluated(self):
for filter in typ.get_filters():
yield filter
def py__bool__(self):
return None # We don't know the length, because of appends.
def py__class__(self):
return compiled.builtin_from_name(self.evaluator, self.array_type)
@safe_property
def parent(self):
return self.evaluator.BUILTINS
def dict_values(self):
return unite(self._defining_context.eval_node(v) for k, v in self._items())
class ListComprehension(ArrayMixin, Comprehension):
array_type = 'list'
def py__getitem__(self, index):
if isinstance(index, slice):
return set([self])
all_types = list(self.py__iter__())
return all_types[index].infer()
class SetComprehension(ArrayMixin, Comprehension):
array_type = 'set'
@has_builtin_methods
class DictComprehension(ArrayMixin, Comprehension):
array_type = 'dict'
def _get_comp_for(self):
return self._get_comprehension().children[3]
def py__iter__(self):
for keys, values in self._iterate():
yield context.LazyKnownContexts(keys)
def py__getitem__(self, index):
for keys, values in self._iterate():
for k in keys:
if isinstance(k, compiled.CompiledObject):
if k.obj == index:
return values
return self.dict_values()
def dict_values(self):
return unite(values for keys, values in self._iterate())
@register_builtin_method('values')
def _imitate_values(self):
lazy_context = context.LazyKnownContexts(self.dict_values())
return set([FakeSequence(self.evaluator, 'list', [lazy_context])])
@register_builtin_method('items')
def _imitate_items(self):
items = set(
FakeSequence(
self.evaluator, 'tuple'
(context.LazyKnownContexts(keys), context.LazyKnownContexts(values))
) for keys, values in self._iterate()
)
return create_evaluated_sequence_set(self.evaluator, items, sequence_type='list')
class GeneratorComprehension(GeneratorMixin, Comprehension):
pass
class SequenceLiteralContext(ArrayMixin, AbstractSequence):
mapping = {'(': 'tuple',
'[': 'list',
'{': 'set'}
def __init__(self, evaluator, defining_context, atom):
super(SequenceLiteralContext, self).__init__(evaluator)
self.atom = atom
self._defining_context = defining_context
if self.atom.type in ('testlist_star_expr', 'testlist'):
self.array_type = 'tuple'
else:
self.array_type = SequenceLiteralContext.mapping[atom.children[0]]
"""The builtin name of the array (list, set, tuple or dict)."""
def py__getitem__(self, index):
"""Here the index is an int/str. Raises IndexError/KeyError."""
if self.array_type == 'dict':
for key, value in self._items():
for k in self._defining_context.eval_node(key):
if isinstance(k, compiled.CompiledObject) \
and index == k.obj:
return self._defining_context.eval_node(value)
raise KeyError('No key found in dictionary %s.' % self)
# Can raise an IndexError
if isinstance(index, slice):
return set([self])
else:
return self._defining_context.eval_node(self._items()[index])
def py__iter__(self):
"""
While values returns the possible values for any array field, this
function returns the value for a certain index.
"""
if self.array_type == 'dict':
# Get keys.
types = set()
for k, _ in self._items():
types |= self._defining_context.eval_node(k)
# We don't know which dict index comes first, therefore always
# yield all the types.
for _ in types:
yield context.LazyKnownContexts(types)
else:
for node in self._items():
yield context.LazyTreeContext(self._defining_context, node)
for addition in check_array_additions(self._defining_context, self):
yield addition
def _values(self):
"""Returns a list of a list of node."""
if self.array_type == 'dict':
return unite(v for k, v in self._items())
else:
return self._items()
def _items(self):
c = self.atom.children
if self.atom.type in ('testlist_star_expr', 'testlist'):
return c[::2]
array_node = c[1]
if array_node in (']', '}', ')'):
return [] # Direct closing bracket, doesn't contain items.
if array_node.type == 'testlist_comp':
return array_node.children[::2]
elif array_node.type == 'dictorsetmaker':
kv = []
iterator = iter(array_node.children)
for key in iterator:
op = next(iterator, None)
if op is None or op == ',':
kv.append(key) # A set.
else:
assert op == ':' # A dict.
kv.append((key, next(iterator)))
next(iterator, None) # Possible comma.
return kv
else:
return [array_node]
def exact_key_items(self):
"""
Returns a generator of tuples like dict.items(), where the key is
resolved (as a string) and the values are still lazy contexts.
"""
for key_node, value in self._items():
for key in self._defining_context.eval_node(key_node):
if precedence.is_string(key):
yield key.obj, context.LazyTreeContext(self._defining_context, value)
def __repr__(self):
return "<%s of %s>" % (self.__class__.__name__, self.atom)
@has_builtin_methods
class DictLiteralContext(SequenceLiteralContext):
array_type = 'dict'
def __init__(self, evaluator, defining_context, atom):
super(SequenceLiteralContext, self).__init__(evaluator)
self._defining_context = defining_context
self.atom = atom
@register_builtin_method('values')
def _imitate_values(self):
lazy_context = context.LazyKnownContexts(self.dict_values())
return set([FakeSequence(self.evaluator, 'list', [lazy_context])])
@register_builtin_method('items')
def _imitate_items(self):
lazy_contexts = [
context.LazyKnownContext(FakeSequence(
self.evaluator, 'tuple',
(context.LazyTreeContext(self._defining_context, key_node),
context.LazyTreeContext(self._defining_context, value_node))
)) for key_node, value_node in self._items()
]
return set([FakeSequence(self.evaluator, 'list', lazy_contexts)])
class _FakeArray(SequenceLiteralContext):
def __init__(self, evaluator, container, type):
super(SequenceLiteralContext, self).__init__(evaluator)
self.array_type = type
self.atom = container
# TODO is this class really needed?
class FakeSequence(_FakeArray):
def __init__(self, evaluator, array_type, lazy_context_list):
"""
type should be one of "tuple", "list"
"""
super(FakeSequence, self).__init__(evaluator, None, array_type)
self._lazy_context_list = lazy_context_list
def py__getitem__(self, index):
return set(self._lazy_context_list[index].infer())
def py__iter__(self):
return self._lazy_context_list
def py__bool__(self):
return bool(len(self._lazy_context_list))
def __repr__(self):
return "<%s of %s>" % (type(self).__name__, self._lazy_context_list)
class FakeDict(_FakeArray):
def __init__(self, evaluator, dct):
super(FakeDict, self).__init__(evaluator, dct, 'dict')
self._dct = dct
def py__iter__(self):
for key in self._dct:
yield context.LazyKnownContext(compiled.create(self.evaluator, key))
def py__getitem__(self, index):
return self._dct[index].infer()
def dict_values(self):
return unite(lazy_context.infer() for lazy_context in self._dct.values())
def exact_key_items(self):
return self._dct.items()
class MergedArray(_FakeArray):
def __init__(self, evaluator, arrays):
super(MergedArray, self).__init__(evaluator, arrays, arrays[-1].array_type)
self._arrays = arrays
def py__iter__(self):
for array in self._arrays:
for lazy_context in array.py__iter__():
yield lazy_context
def py__getitem__(self, index):
return unite(lazy_context.infer() for lazy_context in self.py__iter__())
def _items(self):
for array in self._arrays:
for a in array._items():
yield a
def __len__(self):
return sum(len(a) for a in self._arrays)
def unpack_tuple_to_dict(context, types, exprlist):
"""
Unpacking tuple assignments in for statements and expr_stmts.
"""
if exprlist.type == 'name':
return {exprlist.value: types}
elif exprlist.type == 'atom' and exprlist.children[0] in '([':
return unpack_tuple_to_dict(context, types, exprlist.children[1])
elif exprlist.type in ('testlist', 'testlist_comp', 'exprlist',
'testlist_star_expr'):
dct = {}
parts = iter(exprlist.children[::2])
n = 0
for lazy_context in py__iter__(context.evaluator, types, exprlist):
n += 1
try:
part = next(parts)
except StopIteration:
# TODO this context is probably not right.
analysis.add(context, 'value-error-too-many-values', part,
message="ValueError: too many values to unpack (expected %s)" % n)
else:
dct.update(unpack_tuple_to_dict(context, lazy_context.infer(), part))
has_parts = next(parts, None)
if types and has_parts is not None:
# TODO this context is probably not right.
analysis.add(context, 'value-error-too-few-values', has_parts,
message="ValueError: need more than %s values to unpack" % n)
return dct
elif exprlist.type == 'power' or exprlist.type == 'atom_expr':
# Something like ``arr[x], var = ...``.
# This is something that is not yet supported, would also be difficult
# to write into a dict.
return {}
elif exprlist.type == 'star_expr': # `a, *b, c = x` type unpackings
# Currently we're not supporting them.
return {}
raise NotImplementedError
def py__iter__(evaluator, types, contextualized_node=None):
debug.dbg('py__iter__')
type_iters = []
for typ in types:
try:
iter_method = typ.py__iter__
except AttributeError:
if contextualized_node is not None:
analysis.add(
contextualized_node.context,
'type-error-not-iterable',
contextualized_node._node,
message="TypeError: '%s' object is not iterable" % typ)
else:
type_iters.append(iter_method())
for lazy_contexts in zip_longest(*type_iters):
yield context.get_merged_lazy_context(
[l for l in lazy_contexts if l is not None]
)
def py__iter__types(evaluator, types, contextualized_node=None):
"""
Calls `py__iter__`, but ignores the ordering in the end and just returns
all types that it contains.
"""
return unite(
lazy_context.infer()
for lazy_context in py__iter__(evaluator, types, contextualized_node)
)
def py__getitem__(evaluator, context, types, trailer):
from jedi.evaluate.representation import ClassContext
from jedi.evaluate.instance import TreeInstance
result = set()
trailer_op, node, trailer_cl = trailer.children
assert trailer_op == "["
assert trailer_cl == "]"
# special case: PEP0484 typing module, see
# https://github.com/davidhalter/jedi/issues/663
for typ in list(types):
if isinstance(typ, (ClassContext, TreeInstance)):
typing_module_types = pep0484.py__getitem__(context, typ, node)
if typing_module_types is not None:
types.remove(typ)
result |= typing_module_types
if not types:
# all consumed by special cases
return result
for index in create_index_types(evaluator, context, node):
if isinstance(index, (compiled.CompiledObject, Slice)):
index = index.obj
if type(index) not in (float, int, str, unicode, slice, type(Ellipsis)):
# If the index is not clearly defined, we have to get all the
# possiblities.
for typ in list(types):
if isinstance(typ, AbstractSequence) and typ.array_type == 'dict':
types.remove(typ)
result |= typ.dict_values()
return result | py__iter__types(evaluator, types)
for typ in types:
# The actual getitem call.
try:
getitem = typ.py__getitem__
except AttributeError:
# TODO this context is probably not right.
analysis.add(context, 'type-error-not-subscriptable', trailer_op,
message="TypeError: '%s' object is not subscriptable" % typ)
else:
try:
result |= getitem(index)
except IndexError:
result |= py__iter__types(evaluator, set([typ]))
except KeyError:
# Must be a dict. Lists don't raise KeyErrors.
result |= typ.dict_values()
return result
def check_array_additions(context, sequence):
""" Just a mapper function for the internal _check_array_additions """
if sequence.array_type not in ('list', 'set'):
# TODO also check for dict updates
return set()
return _check_array_additions(context, sequence)
@evaluator_method_cache(default=set())
@debug.increase_indent
def _check_array_additions(context, sequence):
"""
Checks if a `Array` has "add" (append, insert, extend) statements:
>>> a = [""]
>>> a.append(1)
"""
from jedi.evaluate import param
debug.dbg('Dynamic array search for %s' % sequence, color='MAGENTA')
module_context = context.get_root_context()
if not settings.dynamic_array_additions or isinstance(module_context, compiled.CompiledObject):
debug.dbg('Dynamic array search aborted.', color='MAGENTA')
return set()
def find_additions(context, arglist, add_name):
params = list(param.TreeArguments(context.evaluator, context, arglist).unpack())
result = set()
if add_name in ['insert']:
params = params[1:]
if add_name in ['append', 'add', 'insert']:
for key, lazy_context in params:
result.add(lazy_context)
elif add_name in ['extend', 'update']:
for key, lazy_context in params:
result |= set(py__iter__(context.evaluator, lazy_context.infer()))
return result
temp_param_add, settings.dynamic_params_for_other_modules = \
settings.dynamic_params_for_other_modules, False
is_list = sequence.name.string_name == 'list'
search_names = (['append', 'extend', 'insert'] if is_list else ['add', 'update'])
added_types = set()
for add_name in search_names:
try:
possible_names = module_context.tree_node.get_used_names()[add_name]
except KeyError:
continue
else:
for name in possible_names:
context_node = context.tree_node
if not (context_node.start_pos < name.start_pos < context_node.end_pos):
continue
trailer = name.parent
power = trailer.parent
trailer_pos = power.children.index(trailer)
try:
execution_trailer = power.children[trailer_pos + 1]
except IndexError:
continue
else:
if execution_trailer.type != 'trailer' \
or execution_trailer.children[0] != '(' \
or execution_trailer.children[1] == ')':
continue
random_context = context.create_context(name)
with recursion.execution_allowed(context.evaluator, power) as allowed:
if allowed:
found = helpers.evaluate_call_of_leaf(
random_context,
name,
cut_own_trailer=True
)
if sequence in found:
# The arrays match. Now add the results
added_types |= find_additions(
random_context,
execution_trailer.children[1],
add_name
)
# reset settings
settings.dynamic_params_for_other_modules = temp_param_add
debug.dbg('Dynamic array result %s' % added_types, color='MAGENTA')
return added_types
def get_dynamic_array_instance(instance):
"""Used for set() and list() instances."""
if not settings.dynamic_array_additions:
return instance.var_args
ai = _ArrayInstance(instance)
from jedi.evaluate import param
return param.ValuesArguments([[ai]])
class _ArrayInstance(object):
"""
Used for the usage of set() and list().
This is definitely a hack, but a good one :-)
It makes it possible to use set/list conversions.
In contrast to Array, ListComprehension and all other iterable types, this
is something that is only used inside `evaluate/compiled/fake/builtins.py`
and therefore doesn't need filters, `py__bool__` and so on, because
we don't use these operations in `builtins.py`.
"""
def __init__(self, instance):
self.instance = instance
self.var_args = instance.var_args
def py__iter__(self):
var_args = self.var_args
try:
_, lazy_context = next(var_args.unpack())
except StopIteration:
pass
else:
for lazy in py__iter__(self.instance.evaluator, lazy_context.infer()):
yield lazy
from jedi.evaluate import param
if isinstance(var_args, param.TreeArguments):
additions = _check_array_additions(var_args.context, self.instance)
for addition in additions:
yield addition
class Slice(context.Context):
def __init__(self, context, start, stop, step):
super(Slice, self).__init__(
context.evaluator,
parent_context=context.evaluator.BUILTINS
)
self._context = context
# all of them are either a Precedence or None.
self._start = start
self._stop = stop
self._step = step
@property
def obj(self):
"""
Imitate CompiledObject.obj behavior and return a ``builtin.slice()``
object.
"""
def get(element):
if element is None:
return None
result = self._context.eval_node(element)
if len(result) != 1:
# For simplicity, we want slices to be clear defined with just
# one type. Otherwise we will return an empty slice object.
raise IndexError
try:
return list(result)[0].obj
except AttributeError:
return None
try:
return slice(get(self._start), get(self._stop), get(self._step))
except IndexError:
return slice(None, None, None)
def create_index_types(evaluator, context, index):
"""
Handles slices in subscript nodes.
"""
if index == ':':
# Like array[:]
return set([Slice(context, None, None, None)])
elif index.type == 'subscript' and not index.children[0] == '.':
# subscript basically implies a slice operation, except for Python 2's
# Ellipsis.
# e.g. array[:3]
result = []
for el in index.children:
if el == ':':
if not result:
result.append(None)
elif el.type == 'sliceop':
if len(el.children) == 2:
result.append(el.children[1])
else:
result.append(el)
result += [None] * (3 - len(result))
return set([Slice(context, *result)])
# No slices
return context.eval_node(index)

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@ -0,0 +1,100 @@
"""
This module is not intended to be used in jedi, rather it will be fed to the
jedi-parser to replace classes in the typing module
"""
try:
from collections import abc
except ImportError:
# python 2
import collections as abc
def factory(typing_name, indextypes):
class Iterable(abc.Iterable):
def __iter__(self):
while True:
yield indextypes[0]()
class Iterator(Iterable, abc.Iterator):
def next(self):
""" needed for python 2 """
return self.__next__()
def __next__(self):
return indextypes[0]()
class Sequence(abc.Sequence):
def __getitem__(self, index):
return indextypes[0]()
class MutableSequence(Sequence, abc.MutableSequence):
pass
class List(MutableSequence, list):
pass
class Tuple(Sequence, tuple):
def __getitem__(self, index):
if indextypes[1] == Ellipsis:
# https://www.python.org/dev/peps/pep-0484/#the-typing-module
# Tuple[int, ...] means a tuple of ints of indetermined length
return indextypes[0]()
else:
return indextypes[index]()
class AbstractSet(Iterable, abc.Set):
pass
class MutableSet(AbstractSet, abc.MutableSet):
pass
class KeysView(Iterable, abc.KeysView):
pass
class ValuesView(abc.ValuesView):
def __iter__(self):
while True:
yield indextypes[1]()
class ItemsView(abc.ItemsView):
def __iter__(self):
while True:
yield (indextypes[0](), indextypes[1]())
class Mapping(Iterable, abc.Mapping):
def __getitem__(self, item):
return indextypes[1]()
def keys(self):
return KeysView()
def values(self):
return ValuesView()
def items(self):
return ItemsView()
class MutableMapping(Mapping, abc.MutableMapping):
pass
class Dict(MutableMapping, dict):
pass
dct = {
"Sequence": Sequence,
"MutableSequence": MutableSequence,
"List": List,
"Iterable": Iterable,
"Iterator": Iterator,
"AbstractSet": AbstractSet,
"MutableSet": MutableSet,
"Mapping": Mapping,
"MutableMapping": MutableMapping,
"Tuple": Tuple,
"KeysView": KeysView,
"ItemsView": ItemsView,
"ValuesView": ValuesView,
"Dict": Dict,
}
return dct[typing_name]

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@ -0,0 +1,433 @@
from collections import defaultdict
from jedi._compatibility import zip_longest
from jedi import debug
from jedi import common
from parso.python import tree
from jedi.evaluate import iterable
from jedi.evaluate import analysis
from jedi.evaluate import context
from jedi.evaluate import docstrings
from jedi.evaluate import pep0484
from jedi.evaluate.filters import ParamName
def add_argument_issue(parent_context, error_name, lazy_context, message):
if isinstance(lazy_context, context.LazyTreeContext):
node = lazy_context.data
if node.parent.type == 'argument':
node = node.parent
analysis.add(parent_context, error_name, node, message)
def try_iter_content(types, depth=0):
"""Helper method for static analysis."""
if depth > 10:
# It's possible that a loop has references on itself (especially with
# CompiledObject). Therefore don't loop infinitely.
return
for typ in types:
try:
f = typ.py__iter__
except AttributeError:
pass
else:
for lazy_context in f():
try_iter_content(lazy_context.infer(), depth + 1)
class AbstractArguments():
context = None
def eval_argument_clinic(self, parameters):
"""Uses a list with argument clinic information (see PEP 436)."""
iterator = self.unpack()
for i, (name, optional, allow_kwargs) in enumerate(parameters):
key, argument = next(iterator, (None, None))
if key is not None:
raise NotImplementedError
if argument is None and not optional:
debug.warning('TypeError: %s expected at least %s arguments, got %s',
name, len(parameters), i)
raise ValueError
values = set() if argument is None else argument.infer()
if not values and not optional:
# For the stdlib we always want values. If we don't get them,
# that's ok, maybe something is too hard to resolve, however,
# we will not proceed with the evaluation of that function.
debug.warning('argument_clinic "%s" not resolvable.', name)
raise ValueError
yield values
def eval_all(self, funcdef=None):
"""
Evaluates all arguments as a support for static analysis
(normally Jedi).
"""
for key, lazy_context in self.unpack():
types = lazy_context.infer()
try_iter_content(types)
def get_calling_nodes(self):
raise NotImplementedError
def unpack(self, funcdef=None):
raise NotImplementedError
def get_params(self, execution_context):
return get_params(execution_context, self)
class AnonymousArguments(AbstractArguments):
def get_params(self, execution_context):
from jedi.evaluate.dynamic import search_params
return search_params(
execution_context.evaluator,
execution_context,
execution_context.tree_node
)
class TreeArguments(AbstractArguments):
def __init__(self, evaluator, context, argument_node, trailer=None):
"""
The argument_node is either a parser node or a list of evaluated
objects. Those evaluated objects may be lists of evaluated objects
themselves (one list for the first argument, one for the second, etc).
:param argument_node: May be an argument_node or a list of nodes.
"""
self.argument_node = argument_node
self.context = context
self._evaluator = evaluator
self.trailer = trailer # Can be None, e.g. in a class definition.
def _split(self):
if isinstance(self.argument_node, (tuple, list)):
for el in self.argument_node:
yield 0, el
else:
if not (self.argument_node.type == 'arglist' or (
# in python 3.5 **arg is an argument, not arglist
(self.argument_node.type == 'argument') and
self.argument_node.children[0] in ('*', '**'))):
yield 0, self.argument_node
return
iterator = iter(self.argument_node.children)
for child in iterator:
if child == ',':
continue
elif child in ('*', '**'):
yield len(child.value), next(iterator)
elif child.type == 'argument' and \
child.children[0] in ('*', '**'):
assert len(child.children) == 2
yield len(child.children[0].value), child.children[1]
else:
yield 0, child
def unpack(self, funcdef=None):
named_args = []
for star_count, el in self._split():
if star_count == 1:
arrays = self.context.eval_node(el)
iterators = [_iterate_star_args(self.context, a, el, funcdef)
for a in arrays]
iterators = list(iterators)
for values in list(zip_longest(*iterators)):
# TODO zip_longest yields None, that means this would raise
# an exception?
yield None, context.get_merged_lazy_context(
[v for v in values if v is not None]
)
elif star_count == 2:
arrays = self._evaluator.eval_element(self.context, el)
for dct in arrays:
for key, values in _star_star_dict(self.context, dct, el, funcdef):
yield key, values
else:
if el.type == 'argument':
c = el.children
if len(c) == 3: # Keyword argument.
named_args.append((c[0].value, context.LazyTreeContext(self.context, c[2]),))
else: # Generator comprehension.
# Include the brackets with the parent.
comp = iterable.GeneratorComprehension(
self._evaluator, self.context, self.argument_node.parent)
yield None, context.LazyKnownContext(comp)
else:
yield None, context.LazyTreeContext(self.context, el)
# Reordering var_args is necessary, because star args sometimes appear
# after named argument, but in the actual order it's prepended.
for named_arg in named_args:
yield named_arg
def as_tree_tuple_objects(self):
for star_count, argument in self._split():
if argument.type == 'argument':
argument, default = argument.children[::2]
else:
default = None
yield argument, default, star_count
def __repr__(self):
return '<%s: %s>' % (self.__class__.__name__, self.argument_node)
def get_calling_nodes(self):
from jedi.evaluate.dynamic import MergedExecutedParams
old_arguments_list = []
arguments = self
while arguments not in old_arguments_list:
if not isinstance(arguments, TreeArguments):
break
old_arguments_list.append(arguments)
for name, default, star_count in reversed(list(arguments.as_tree_tuple_objects())):
if not star_count or not isinstance(name, tree.Name):
continue
names = self._evaluator.goto(arguments.context, name)
if len(names) != 1:
break
if not isinstance(names[0], ParamName):
break
param = names[0].get_param()
if isinstance(param, MergedExecutedParams):
# For dynamic searches we don't even want to see errors.
return []
if not isinstance(param, ExecutedParam):
break
if param.var_args is None:
break
arguments = param.var_args
break
return [arguments.argument_node or arguments.trailer]
class ValuesArguments(AbstractArguments):
def __init__(self, values_list):
self._values_list = values_list
def unpack(self, funcdef=None):
for values in self._values_list:
yield None, context.LazyKnownContexts(values)
def get_calling_nodes(self):
return []
def __repr__(self):
return '<%s: %s>' % (self.__class__.__name__, self._values_list)
class ExecutedParam(object):
"""Fake a param and give it values."""
def __init__(self, execution_context, param_node, lazy_context):
self._execution_context = execution_context
self._param_node = param_node
self._lazy_context = lazy_context
self.string_name = param_node.name.value
def infer(self):
pep0484_hints = pep0484.infer_param(self._execution_context, self._param_node)
doc_params = docstrings.infer_param(self._execution_context, self._param_node)
if pep0484_hints or doc_params:
return list(set(pep0484_hints) | set(doc_params))
return self._lazy_context.infer()
@property
def var_args(self):
return self._execution_context.var_args
def __repr__(self):
return '<%s: %s>' % (self.__class__.__name__, self.string_name)
def get_params(execution_context, var_args):
result_params = []
param_dict = {}
funcdef = execution_context.tree_node
parent_context = execution_context.parent_context
for param in funcdef.get_params():
param_dict[param.name.value] = param
unpacked_va = list(var_args.unpack(funcdef))
var_arg_iterator = common.PushBackIterator(iter(unpacked_va))
non_matching_keys = defaultdict(lambda: [])
keys_used = {}
keys_only = False
had_multiple_value_error = False
for param in funcdef.get_params():
# The value and key can both be null. There, the defaults apply.
# args / kwargs will just be empty arrays / dicts, respectively.
# Wrong value count is just ignored. If you try to test cases that are
# not allowed in Python, Jedi will maybe not show any completions.
key, argument = next(var_arg_iterator, (None, None))
while key is not None:
keys_only = True
try:
key_param = param_dict[key]
except KeyError:
non_matching_keys[key] = argument
else:
if key in keys_used:
had_multiple_value_error = True
m = ("TypeError: %s() got multiple values for keyword argument '%s'."
% (funcdef.name, key))
for node in var_args.get_calling_nodes():
analysis.add(parent_context, 'type-error-multiple-values',
node, message=m)
else:
keys_used[key] = ExecutedParam(execution_context, key_param, argument)
key, argument = next(var_arg_iterator, (None, None))
try:
result_params.append(keys_used[param.name.value])
continue
except KeyError:
pass
if param.star_count == 1:
# *args param
lazy_context_list = []
if argument is not None:
lazy_context_list.append(argument)
for key, argument in var_arg_iterator:
# Iterate until a key argument is found.
if key:
var_arg_iterator.push_back((key, argument))
break
lazy_context_list.append(argument)
seq = iterable.FakeSequence(execution_context.evaluator, 'tuple', lazy_context_list)
result_arg = context.LazyKnownContext(seq)
elif param.star_count == 2:
# **kwargs param
dct = iterable.FakeDict(execution_context.evaluator, dict(non_matching_keys))
result_arg = context.LazyKnownContext(dct)
non_matching_keys = {}
else:
# normal param
if argument is None:
# No value: Return an empty container
if param.default is None:
result_arg = context.LazyUnknownContext()
if not keys_only:
for node in var_args.get_calling_nodes():
m = _error_argument_count(funcdef, len(unpacked_va))
analysis.add(parent_context, 'type-error-too-few-arguments',
node, message=m)
else:
result_arg = context.LazyTreeContext(parent_context, param.default)
else:
result_arg = argument
result_params.append(ExecutedParam(execution_context, param, result_arg))
if not isinstance(result_arg, context.LazyUnknownContext):
keys_used[param.name.value] = result_params[-1]
if keys_only:
# All arguments should be handed over to the next function. It's not
# about the values inside, it's about the names. Jedi needs to now that
# there's nothing to find for certain names.
for k in set(param_dict) - set(keys_used):
param = param_dict[k]
if not (non_matching_keys or had_multiple_value_error or
param.star_count or param.default):
# add a warning only if there's not another one.
for node in var_args.get_calling_nodes():
m = _error_argument_count(funcdef, len(unpacked_va))
analysis.add(parent_context, 'type-error-too-few-arguments',
node, message=m)
for key, lazy_context in non_matching_keys.items():
m = "TypeError: %s() got an unexpected keyword argument '%s'." \
% (funcdef.name, key)
add_argument_issue(
parent_context,
'type-error-keyword-argument',
lazy_context,
message=m
)
remaining_arguments = list(var_arg_iterator)
if remaining_arguments:
m = _error_argument_count(funcdef, len(unpacked_va))
# Just report an error for the first param that is not needed (like
# cPython).
first_key, lazy_context = remaining_arguments[0]
if var_args.get_calling_nodes():
# There might not be a valid calling node so check for that first.
add_argument_issue(parent_context, 'type-error-too-many-arguments', lazy_context, message=m)
return result_params
def _iterate_star_args(context, array, input_node, funcdef=None):
try:
iter_ = array.py__iter__
except AttributeError:
if funcdef is not None:
# TODO this funcdef should not be needed.
m = "TypeError: %s() argument after * must be a sequence, not %s" \
% (funcdef.name.value, array)
analysis.add(context, 'type-error-star', input_node, message=m)
else:
for lazy_context in iter_():
yield lazy_context
def _star_star_dict(context, array, input_node, funcdef):
from jedi.evaluate.instance import CompiledInstance
if isinstance(array, CompiledInstance) and array.name.string_name == 'dict':
# For now ignore this case. In the future add proper iterators and just
# make one call without crazy isinstance checks.
return {}
elif isinstance(array, iterable.AbstractSequence) and array.array_type == 'dict':
return array.exact_key_items()
else:
if funcdef is not None:
m = "TypeError: %s argument after ** must be a mapping, not %s" \
% (funcdef.name.value, array)
analysis.add(context, 'type-error-star-star', input_node, message=m)
return {}
def _error_argument_count(funcdef, actual_count):
params = funcdef.get_params()
default_arguments = sum(1 for p in params if p.default or p.star_count)
if default_arguments == 0:
before = 'exactly '
else:
before = 'from %s to ' % (len(params) - default_arguments)
return ('TypeError: %s() takes %s%s arguments (%s given).'
% (funcdef.name, before, len(params), actual_count))
def _create_default_param(execution_context, param):
if param.star_count == 1:
result_arg = context.LazyKnownContext(
iterable.FakeSequence(execution_context.evaluator, 'tuple', [])
)
elif param.star_count == 2:
result_arg = context.LazyKnownContext(
iterable.FakeDict(execution_context.evaluator, {})
)
elif param.default is None:
result_arg = context.LazyUnknownContext()
else:
result_arg = context.LazyTreeContext(execution_context.parent_context, param.default)
return ExecutedParam(execution_context, param, result_arg)
def create_default_params(execution_context, funcdef):
return [_create_default_param(execution_context, p)
for p in funcdef.get_params()]

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from jedi.evaluate.cache import evaluator_function_cache
@evaluator_function_cache()
def get_yield_exprs(evaluator, funcdef):
return list(funcdef.iter_yield_exprs())

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@ -0,0 +1,224 @@
"""
PEP 0484 ( https://www.python.org/dev/peps/pep-0484/ ) describes type hints
through function annotations. There is a strong suggestion in this document
that only the type of type hinting defined in PEP0484 should be allowed
as annotations in future python versions.
The (initial / probably incomplete) implementation todo list for pep-0484:
v Function parameter annotations with builtin/custom type classes
v Function returntype annotations with builtin/custom type classes
v Function parameter annotations with strings (forward reference)
v Function return type annotations with strings (forward reference)
v Local variable type hints
v Assigned types: `Url = str\ndef get(url:Url) -> str:`
v Type hints in `with` statements
x Stub files support
x support `@no_type_check` and `@no_type_check_decorator`
x support for typing.cast() operator
x support for type hint comments for functions, `# type: (int, str) -> int`.
See comment from Guido https://github.com/davidhalter/jedi/issues/662
"""
import itertools
import os
import re
from parso import ParserSyntaxError
from parso.python import tree
from jedi.common import unite
from jedi.evaluate.cache import evaluator_method_cache
from jedi.evaluate import compiled
from jedi.evaluate.context import LazyTreeContext
from jedi import debug
from jedi import _compatibility
from jedi import parser_utils
def _evaluate_for_annotation(context, annotation, index=None):
"""
Evaluates a string-node, looking for an annotation
If index is not None, the annotation is expected to be a tuple
and we're interested in that index
"""
if annotation is not None:
definitions = context.eval_node(
_fix_forward_reference(context, annotation))
if index is not None:
definitions = list(itertools.chain.from_iterable(
definition.py__getitem__(index) for definition in definitions
if definition.array_type == 'tuple' and
len(list(definition.py__iter__())) >= index))
return unite(d.execute_evaluated() for d in definitions)
else:
return set()
def _fix_forward_reference(context, node):
evaled_nodes = context.eval_node(node)
if len(evaled_nodes) != 1:
debug.warning("Eval'ed typing index %s should lead to 1 object, "
" not %s" % (node, evaled_nodes))
return node
evaled_node = list(evaled_nodes)[0]
if isinstance(evaled_node, compiled.CompiledObject) and \
isinstance(evaled_node.obj, str):
try:
new_node = context.evaluator.grammar.parse(
_compatibility.unicode(evaled_node.obj),
start_symbol='eval_input',
error_recovery=False
)
except ParserSyntaxError:
debug.warning('Annotation not parsed: %s' % evaled_node.obj)
return node
else:
module = node.get_root_node()
parser_utils.move(new_node, module.end_pos[0])
new_node.parent = context.tree_node
return new_node
else:
return node
@evaluator_method_cache()
def infer_param(execution_context, param):
annotation = param.annotation
module_context = execution_context.get_root_context()
return _evaluate_for_annotation(module_context, annotation)
def py__annotations__(funcdef):
return_annotation = funcdef.annotation
if return_annotation:
dct = {'return': return_annotation}
else:
dct = {}
for function_param in funcdef.get_params():
param_annotation = function_param.annotation
if param_annotation is not None:
dct[function_param.name.value] = param_annotation
return dct
@evaluator_method_cache()
def infer_return_types(function_context):
annotation = py__annotations__(function_context.tree_node).get("return", None)
module_context = function_context.get_root_context()
return _evaluate_for_annotation(module_context, annotation)
_typing_module = None
def _get_typing_replacement_module(grammar):
"""
The idea is to return our jedi replacement for the PEP-0484 typing module
as discussed at https://github.com/davidhalter/jedi/issues/663
"""
global _typing_module
if _typing_module is None:
typing_path = \
os.path.abspath(os.path.join(__file__, "../jedi_typing.py"))
with open(typing_path) as f:
code = _compatibility.unicode(f.read())
_typing_module = grammar.parse(code)
return _typing_module
def py__getitem__(context, typ, node):
if not typ.get_root_context().name.string_name == "typing":
return None
# we assume that any class using [] in a module called
# "typing" with a name for which we have a replacement
# should be replaced by that class. This is not 100%
# airtight but I don't have a better idea to check that it's
# actually the PEP-0484 typing module and not some other
if node.type == "subscriptlist":
nodes = node.children[::2] # skip the commas
else:
nodes = [node]
del node
nodes = [_fix_forward_reference(context, node) for node in nodes]
type_name = typ.name.string_name
# hacked in Union and Optional, since it's hard to do nicely in parsed code
if type_name in ("Union", '_Union'):
# In Python 3.6 it's still called typing.Union but it's an instance
# called _Union.
return unite(context.eval_node(node) for node in nodes)
if type_name in ("Optional", '_Optional'):
# Here we have the same issue like in Union. Therefore we also need to
# check for the instance typing._Optional (Python 3.6).
return context.eval_node(nodes[0])
from jedi.evaluate.representation import ModuleContext
typing = ModuleContext(
context.evaluator,
module_node=_get_typing_replacement_module(context.evaluator.latest_grammar),
path=None
)
factories = typing.py__getattribute__("factory")
assert len(factories) == 1
factory = list(factories)[0]
assert factory
function_body_nodes = factory.tree_node.children[4].children
valid_classnames = set(child.name.value
for child in function_body_nodes
if isinstance(child, tree.Class))
if type_name not in valid_classnames:
return None
compiled_classname = compiled.create(context.evaluator, type_name)
from jedi.evaluate.iterable import FakeSequence
args = FakeSequence(
context.evaluator,
"tuple",
[LazyTreeContext(context, n) for n in nodes]
)
result = factory.execute_evaluated(compiled_classname, args)
return result
def find_type_from_comment_hint_for(context, node, name):
return _find_type_from_comment_hint(context, node, node.children[1], name)
def find_type_from_comment_hint_with(context, node, name):
assert len(node.children[1].children) == 3, \
"Can only be here when children[1] is 'foo() as f'"
varlist = node.children[1].children[2]
return _find_type_from_comment_hint(context, node, varlist, name)
def find_type_from_comment_hint_assign(context, node, name):
return _find_type_from_comment_hint(context, node, node.children[0], name)
def _find_type_from_comment_hint(context, node, varlist, name):
index = None
if varlist.type in ("testlist_star_expr", "exprlist", "testlist"):
# something like "a, b = 1, 2"
index = 0
for child in varlist.children:
if child == name:
break
if child.type == "operator":
continue
index += 1
else:
return []
comment = parser_utils.get_following_comment_same_line(node)
if comment is None:
return []
match = re.match(r"^#\s*type:\s*([^#]*)", comment)
if not match:
return []
annotation = tree.String(
repr(str(match.group(1).strip())),
node.start_pos)
annotation.parent = node.parent
return _evaluate_for_annotation(context, annotation, index)

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"""
Handles operator precedence.
"""
import operator as op
from jedi._compatibility import unicode
from jedi import debug
from jedi.evaluate.compiled import CompiledObject, create, builtin_from_name
from jedi.evaluate import analysis
# Maps Python syntax to the operator module.
COMPARISON_OPERATORS = {
'==': op.eq,
'!=': op.ne,
'is': op.is_,
'is not': op.is_not,
'<': op.lt,
'<=': op.le,
'>': op.gt,
'>=': op.ge,
}
def literals_to_types(evaluator, result):
# Changes literals ('a', 1, 1.0, etc) to its type instances (str(),
# int(), float(), etc).
new_result = set()
for typ in result:
if is_literal(typ):
# Literals are only valid as long as the operations are
# correct. Otherwise add a value-free instance.
cls = builtin_from_name(evaluator, typ.name.string_name)
new_result |= cls.execute_evaluated()
else:
new_result.add(typ)
return new_result
def calculate_children(evaluator, context, children):
"""
Calculate a list of children with operators.
"""
iterator = iter(children)
types = context.eval_node(next(iterator))
for operator in iterator:
right = next(iterator)
if operator.type == 'comp_op': # not in / is not
operator = ' '.join(c.value for c in operator.children)
# handle lazy evaluation of and/or here.
if operator in ('and', 'or'):
left_bools = set([left.py__bool__() for left in types])
if left_bools == set([True]):
if operator == 'and':
types = context.eval_node(right)
elif left_bools == set([False]):
if operator != 'and':
types = context.eval_node(right)
# Otherwise continue, because of uncertainty.
else:
types = calculate(evaluator, context, types, operator,
context.eval_node(right))
debug.dbg('calculate_children types %s', types)
return types
def calculate(evaluator, context, left_result, operator, right_result):
result = set()
if not left_result or not right_result:
# illegal slices e.g. cause left/right_result to be None
result = (left_result or set()) | (right_result or set())
result = literals_to_types(evaluator, result)
else:
# I don't think there's a reasonable chance that a string
# operation is still correct, once we pass something like six
# objects.
if len(left_result) * len(right_result) > 6:
result = literals_to_types(evaluator, left_result | right_result)
else:
for left in left_result:
for right in right_result:
result |= _element_calculate(evaluator, context, left, operator, right)
return result
def factor_calculate(evaluator, types, operator):
"""
Calculates `+`, `-`, `~` and `not` prefixes.
"""
for typ in types:
if operator == '-':
if _is_number(typ):
yield create(evaluator, -typ.obj)
elif operator == 'not':
value = typ.py__bool__()
if value is None: # Uncertainty.
return
yield create(evaluator, not value)
else:
yield typ
def _is_number(obj):
return isinstance(obj, CompiledObject) \
and isinstance(obj.obj, (int, float))
def is_string(obj):
return isinstance(obj, CompiledObject) \
and isinstance(obj.obj, (str, unicode))
def is_literal(obj):
return _is_number(obj) or is_string(obj)
def _is_tuple(obj):
from jedi.evaluate import iterable
return isinstance(obj, iterable.AbstractSequence) and obj.array_type == 'tuple'
def _is_list(obj):
from jedi.evaluate import iterable
return isinstance(obj, iterable.AbstractSequence) and obj.array_type == 'list'
def _element_calculate(evaluator, context, left, operator, right):
from jedi.evaluate import iterable, instance
l_is_num = _is_number(left)
r_is_num = _is_number(right)
if operator == '*':
# for iterables, ignore * operations
if isinstance(left, iterable.AbstractSequence) or is_string(left):
return set([left])
elif isinstance(right, iterable.AbstractSequence) or is_string(right):
return set([right])
elif operator == '+':
if l_is_num and r_is_num or is_string(left) and is_string(right):
return set([create(evaluator, left.obj + right.obj)])
elif _is_tuple(left) and _is_tuple(right) or _is_list(left) and _is_list(right):
return set([iterable.MergedArray(evaluator, (left, right))])
elif operator == '-':
if l_is_num and r_is_num:
return set([create(evaluator, left.obj - right.obj)])
elif operator == '%':
# With strings and numbers the left type typically remains. Except for
# `int() % float()`.
return set([left])
elif operator in COMPARISON_OPERATORS:
operation = COMPARISON_OPERATORS[operator]
if isinstance(left, CompiledObject) and isinstance(right, CompiledObject):
# Possible, because the return is not an option. Just compare.
left = left.obj
right = right.obj
try:
result = operation(left, right)
except TypeError:
# Could be True or False.
return set([create(evaluator, True), create(evaluator, False)])
else:
return set([create(evaluator, result)])
elif operator == 'in':
return set()
def check(obj):
"""Checks if a Jedi object is either a float or an int."""
return isinstance(obj, instance.CompiledInstance) and \
obj.name.string_name in ('int', 'float')
# Static analysis, one is a number, the other one is not.
if operator in ('+', '-') and l_is_num != r_is_num \
and not (check(left) or check(right)):
message = "TypeError: unsupported operand type(s) for +: %s and %s"
analysis.add(context, 'type-error-operation', operator,
message % (left, right))
return set([left, right])

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"""
Recursions are the recipe of |jedi| to conquer Python code. However, someone
must stop recursions going mad. Some settings are here to make |jedi| stop at
the right time. You can read more about them :ref:`here <settings-recursion>`.
Next to :mod:`jedi.evaluate.cache` this module also makes |jedi| not
thread-safe. Why? ``execution_recursion_decorator`` uses class variables to
count the function calls.
.. _settings-recursion:
Settings
~~~~~~~~~~
Recursion settings are important if you don't want extremly
recursive python code to go absolutely crazy.
The default values are based on experiments while completing the |jedi| library
itself (inception!). But I don't think there's any other Python library that
uses recursion in a similarly extreme way. Completion should also be fast and
therefore the quality might not always be maximal.
.. autodata:: recursion_limit
.. autodata:: total_function_execution_limit
.. autodata:: per_function_execution_limit
.. autodata:: per_function_recursion_limit
"""
from contextlib import contextmanager
from jedi import debug
recursion_limit = 15
"""
Like ``sys.getrecursionlimit()``, just for |jedi|.
"""
total_function_execution_limit = 200
"""
This is a hard limit of how many non-builtin functions can be executed.
"""
per_function_execution_limit = 6
"""
The maximal amount of times a specific function may be executed.
"""
per_function_recursion_limit = 2
"""
A function may not be executed more than this number of times recursively.
"""
class RecursionDetector(object):
def __init__(self):
self.pushed_nodes = []
@contextmanager
def execution_allowed(evaluator, node):
"""
A decorator to detect recursions in statements. In a recursion a statement
at the same place, in the same module may not be executed two times.
"""
pushed_nodes = evaluator.recursion_detector.pushed_nodes
if node in pushed_nodes:
debug.warning('catched stmt recursion: %s @%s', node,
node.start_pos)
yield False
else:
pushed_nodes.append(node)
yield True
pushed_nodes.pop()
def execution_recursion_decorator(default=set()):
def decorator(func):
def wrapper(execution, **kwargs):
detector = execution.evaluator.execution_recursion_detector
allowed = detector.push_execution(execution)
try:
if allowed:
result = default
else:
result = func(execution, **kwargs)
finally:
detector.pop_execution()
return result
return wrapper
return decorator
class ExecutionRecursionDetector(object):
"""
Catches recursions of executions.
"""
def __init__(self, evaluator):
self._evaluator = evaluator
self._recursion_level = 0
self._parent_execution_funcs = []
self._funcdef_execution_counts = {}
self._execution_count = 0
def pop_execution(self):
self._parent_execution_funcs.pop()
self._recursion_level -= 1
def push_execution(self, execution):
funcdef = execution.tree_node
# These two will be undone in pop_execution.
self._recursion_level += 1
self._parent_execution_funcs.append(funcdef)
module = execution.get_root_context()
if module == self._evaluator.BUILTINS:
# We have control over builtins so we know they are not recursing
# like crazy. Therefore we just let them execute always, because
# they usually just help a lot with getting good results.
return False
if self._recursion_level > recursion_limit:
return True
if self._execution_count >= total_function_execution_limit:
return True
self._execution_count += 1
if self._funcdef_execution_counts.setdefault(funcdef, 0) >= per_function_execution_limit:
return True
self._funcdef_execution_counts[funcdef] += 1
if self._parent_execution_funcs.count(funcdef) > per_function_recursion_limit:
return True
return False

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@ -0,0 +1,684 @@
"""
Like described in the :mod:`parso.python.tree` module,
there's a need for an ast like module to represent the states of parsed
modules.
But now there are also structures in Python that need a little bit more than
that. An ``Instance`` for example is only a ``Class`` before it is
instantiated. This class represents these cases.
So, why is there also a ``Class`` class here? Well, there are decorators and
they change classes in Python 3.
Representation modules also define "magic methods". Those methods look like
``py__foo__`` and are typically mappable to the Python equivalents ``__call__``
and others. Here's a list:
====================================== ========================================
**Method** **Description**
-------------------------------------- ----------------------------------------
py__call__(params: Array) On callable objects, returns types.
py__bool__() Returns True/False/None; None means that
there's no certainty.
py__bases__() Returns a list of base classes.
py__mro__() Returns a list of classes (the mro).
py__iter__() Returns a generator of a set of types.
py__class__() Returns the class of an instance.
py__getitem__(index: int/str) Returns a a set of types of the index.
Can raise an IndexError/KeyError.
py__file__() Only on modules. Returns None if does
not exist.
py__package__() Only on modules. For the import system.
py__path__() Only on modules. For the import system.
py__get__(call_object) Only on instances. Simulates
descriptors.
py__doc__(include_call_signature: Returns the docstring for a context.
bool)
====================================== ========================================
"""
import os
import pkgutil
import imp
import re
from itertools import chain
from parso.python import tree
from parso import python_bytes_to_unicode
from jedi._compatibility import use_metaclass
from jedi import debug
from jedi.evaluate.cache import evaluator_method_cache, CachedMetaClass
from jedi.evaluate import compiled
from jedi.evaluate import recursion
from jedi.evaluate import iterable
from jedi.evaluate import docstrings
from jedi.evaluate import pep0484
from jedi.evaluate import param
from jedi.evaluate import flow_analysis
from jedi.evaluate import imports
from jedi.evaluate import helpers
from jedi.evaluate.filters import ParserTreeFilter, FunctionExecutionFilter, \
GlobalNameFilter, DictFilter, ContextName, AbstractNameDefinition, \
ParamName, AnonymousInstanceParamName, TreeNameDefinition, \
ContextNameMixin
from jedi.evaluate import context
from jedi.evaluate.context import ContextualizedNode
from jedi import parser_utils
from jedi.evaluate.parser_cache import get_yield_exprs
def apply_py__get__(context, base_context):
try:
method = context.py__get__
except AttributeError:
yield context
else:
for descriptor_context in method(base_context):
yield descriptor_context
class ClassName(TreeNameDefinition):
def __init__(self, parent_context, tree_name, name_context):
super(ClassName, self).__init__(parent_context, tree_name)
self._name_context = name_context
def infer(self):
# TODO this _name_to_types might get refactored and be a part of the
# parent class. Once it is, we can probably just overwrite method to
# achieve this.
from jedi.evaluate.finder import _name_to_types
inferred = _name_to_types(
self.parent_context.evaluator, self._name_context, self.tree_name)
for result_context in inferred:
for c in apply_py__get__(result_context, self.parent_context):
yield c
class ClassFilter(ParserTreeFilter):
name_class = ClassName
def _convert_names(self, names):
return [self.name_class(self.context, name, self._node_context)
for name in names]
class ClassContext(use_metaclass(CachedMetaClass, context.TreeContext)):
"""
This class is not only important to extend `tree.Class`, it is also a
important for descriptors (if the descriptor methods are evaluated or not).
"""
api_type = 'class'
def __init__(self, evaluator, classdef, parent_context):
super(ClassContext, self).__init__(evaluator, parent_context=parent_context)
self.tree_node = classdef
@evaluator_method_cache(default=())
def py__mro__(self):
def add(cls):
if cls not in mro:
mro.append(cls)
mro = [self]
# TODO Do a proper mro resolution. Currently we are just listing
# classes. However, it's a complicated algorithm.
for lazy_cls in self.py__bases__():
# TODO there's multiple different mro paths possible if this yields
# multiple possibilities. Could be changed to be more correct.
for cls in lazy_cls.infer():
# TODO detect for TypeError: duplicate base class str,
# e.g. `class X(str, str): pass`
try:
mro_method = cls.py__mro__
except AttributeError:
# TODO add a TypeError like:
"""
>>> class Y(lambda: test): pass
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: function() argument 1 must be code, not str
>>> class Y(1): pass
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: int() takes at most 2 arguments (3 given)
"""
pass
else:
add(cls)
for cls_new in mro_method():
add(cls_new)
return tuple(mro)
@evaluator_method_cache(default=())
def py__bases__(self):
arglist = self.tree_node.get_super_arglist()
if arglist:
args = param.TreeArguments(self.evaluator, self, arglist)
return [value for key, value in args.unpack() if key is None]
else:
return [context.LazyKnownContext(compiled.create(self.evaluator, object))]
def py__call__(self, params):
from jedi.evaluate.instance import TreeInstance
return set([TreeInstance(self.evaluator, self.parent_context, self, params)])
def py__class__(self):
return compiled.create(self.evaluator, type)
def get_params(self):
from jedi.evaluate.instance import AnonymousInstance
anon = AnonymousInstance(self.evaluator, self.parent_context, self)
return [AnonymousInstanceParamName(anon, param.name) for param in self.funcdef.get_params()]
def get_filters(self, search_global, until_position=None, origin_scope=None, is_instance=False):
if search_global:
yield ParserTreeFilter(
self.evaluator,
context=self,
until_position=until_position,
origin_scope=origin_scope
)
else:
for cls in self.py__mro__():
if isinstance(cls, compiled.CompiledObject):
for filter in cls.get_filters(is_instance=is_instance):
yield filter
else:
yield ClassFilter(
self.evaluator, self, node_context=cls,
origin_scope=origin_scope)
def is_class(self):
return True
def get_function_slot_names(self, name):
for filter in self.get_filters(search_global=False):
names = filter.get(name)
if names:
return names
return []
def get_param_names(self):
for name in self.get_function_slot_names('__init__'):
for context_ in name.infer():
try:
method = context_.get_param_names
except AttributeError:
pass
else:
return list(method())[1:]
return []
@property
def name(self):
return ContextName(self, self.tree_node.name)
class LambdaName(AbstractNameDefinition):
string_name = '<lambda>'
def __init__(self, lambda_context):
self._lambda_context = lambda_context
self.parent_context = lambda_context.parent_context
def start_pos(self):
return self._lambda_context.tree_node.start_pos
def infer(self):
return set([self._lambda_context])
class FunctionContext(use_metaclass(CachedMetaClass, context.TreeContext)):
"""
Needed because of decorators. Decorators are evaluated here.
"""
api_type = 'function'
def __init__(self, evaluator, parent_context, funcdef):
""" This should not be called directly """
super(FunctionContext, self).__init__(evaluator, parent_context)
self.tree_node = funcdef
def get_filters(self, search_global, until_position=None, origin_scope=None):
if search_global:
yield ParserTreeFilter(
self.evaluator,
context=self,
until_position=until_position,
origin_scope=origin_scope
)
else:
scope = self.py__class__()
for filter in scope.get_filters(search_global=False, origin_scope=origin_scope):
yield filter
def infer_function_execution(self, function_execution):
"""
Created to be used by inheritance.
"""
yield_exprs = get_yield_exprs(self.evaluator, self.tree_node)
if yield_exprs:
return set([iterable.Generator(self.evaluator, function_execution)])
else:
return function_execution.get_return_values()
def get_function_execution(self, arguments=None):
if arguments is None:
arguments = param.AnonymousArguments()
return FunctionExecutionContext(self.evaluator, self.parent_context, self, arguments)
def py__call__(self, arguments):
function_execution = self.get_function_execution(arguments)
return self.infer_function_execution(function_execution)
def py__class__(self):
# This differentiation is only necessary for Python2. Python3 does not
# use a different method class.
if isinstance(parser_utils.get_parent_scope(self.tree_node), tree.Class):
name = 'METHOD_CLASS'
else:
name = 'FUNCTION_CLASS'
return compiled.get_special_object(self.evaluator, name)
@property
def name(self):
if self.tree_node.type == 'lambdef':
return LambdaName(self)
return ContextName(self, self.tree_node.name)
def get_param_names(self):
function_execution = self.get_function_execution()
return [ParamName(function_execution, param.name)
for param in self.tree_node.get_params()]
class FunctionExecutionContext(context.TreeContext):
"""
This class is used to evaluate functions and their returns.
This is the most complicated class, because it contains the logic to
transfer parameters. It is even more complicated, because there may be
multiple calls to functions and recursion has to be avoided. But this is
responsibility of the decorators.
"""
function_execution_filter = FunctionExecutionFilter
def __init__(self, evaluator, parent_context, function_context, var_args):
super(FunctionExecutionContext, self).__init__(evaluator, parent_context)
self.function_context = function_context
self.tree_node = function_context.tree_node
self.var_args = var_args
@evaluator_method_cache(default=set())
@recursion.execution_recursion_decorator()
def get_return_values(self, check_yields=False):
funcdef = self.tree_node
if funcdef.type == 'lambdef':
return self.evaluator.eval_element(self, funcdef.children[-1])
if check_yields:
types = set()
returns = get_yield_exprs(self.evaluator, funcdef)
else:
returns = funcdef.iter_return_stmts()
types = set(docstrings.infer_return_types(self.function_context))
types |= set(pep0484.infer_return_types(self.function_context))
for r in returns:
check = flow_analysis.reachability_check(self, funcdef, r)
if check is flow_analysis.UNREACHABLE:
debug.dbg('Return unreachable: %s', r)
else:
if check_yields:
types |= set(self._eval_yield(r))
else:
try:
children = r.children
except AttributeError:
types.add(compiled.create(self.evaluator, None))
else:
types |= self.eval_node(children[1])
if check is flow_analysis.REACHABLE:
debug.dbg('Return reachable: %s', r)
break
return types
def _eval_yield(self, yield_expr):
if yield_expr.type == 'keyword':
# `yield` just yields None.
yield context.LazyKnownContext(compiled.create(self.evaluator, None))
return
node = yield_expr.children[1]
if node.type == 'yield_arg': # It must be a yield from.
cn = ContextualizedNode(self, node.children[1])
for lazy_context in iterable.py__iter__(self.evaluator, cn.infer(), cn):
yield lazy_context
else:
yield context.LazyTreeContext(self, node)
@recursion.execution_recursion_decorator(default=iter([]))
def get_yield_values(self):
for_parents = [(y, tree.search_ancestor(y, 'for_stmt', 'funcdef',
'while_stmt', 'if_stmt'))
for y in get_yield_exprs(self.evaluator, self.tree_node)]
# Calculate if the yields are placed within the same for loop.
yields_order = []
last_for_stmt = None
for yield_, for_stmt in for_parents:
# For really simple for loops we can predict the order. Otherwise
# we just ignore it.
parent = for_stmt.parent
if parent.type == 'suite':
parent = parent.parent
if for_stmt.type == 'for_stmt' and parent == self.tree_node \
and parser_utils.for_stmt_defines_one_name(for_stmt): # Simplicity for now.
if for_stmt == last_for_stmt:
yields_order[-1][1].append(yield_)
else:
yields_order.append((for_stmt, [yield_]))
elif for_stmt == self.tree_node:
yields_order.append((None, [yield_]))
else:
types = self.get_return_values(check_yields=True)
if types:
yield context.get_merged_lazy_context(list(types))
return
last_for_stmt = for_stmt
evaluator = self.evaluator
for for_stmt, yields in yields_order:
if for_stmt is None:
# No for_stmt, just normal yields.
for yield_ in yields:
for result in self._eval_yield(yield_):
yield result
else:
input_node = for_stmt.get_testlist()
cn = ContextualizedNode(self, input_node)
ordered = iterable.py__iter__(evaluator, cn.infer(), cn)
ordered = list(ordered)
for lazy_context in ordered:
dct = {str(for_stmt.children[1].value): lazy_context.infer()}
with helpers.predefine_names(self, for_stmt, dct):
for yield_in_same_for_stmt in yields:
for result in self._eval_yield(yield_in_same_for_stmt):
yield result
def get_filters(self, search_global, until_position=None, origin_scope=None):
yield self.function_execution_filter(self.evaluator, self,
until_position=until_position,
origin_scope=origin_scope)
@evaluator_method_cache()
def get_params(self):
return self.var_args.get_params(self)
class ModuleAttributeName(AbstractNameDefinition):
"""
For module attributes like __file__, __str__ and so on.
"""
api_type = 'instance'
def __init__(self, parent_module, string_name):
self.parent_context = parent_module
self.string_name = string_name
def infer(self):
return compiled.create(self.parent_context.evaluator, str).execute(
param.ValuesArguments([])
)
class ModuleName(ContextNameMixin, AbstractNameDefinition):
start_pos = 1, 0
def __init__(self, context, name):
self._context = context
self._name = name
@property
def string_name(self):
return self._name
class ModuleContext(use_metaclass(CachedMetaClass, context.TreeContext)):
api_type = 'module'
parent_context = None
def __init__(self, evaluator, module_node, path):
super(ModuleContext, self).__init__(evaluator, parent_context=None)
self.tree_node = module_node
self._path = path
def get_filters(self, search_global, until_position=None, origin_scope=None):
yield ParserTreeFilter(
self.evaluator,
context=self,
until_position=until_position,
origin_scope=origin_scope
)
yield GlobalNameFilter(self, self.tree_node)
yield DictFilter(self._sub_modules_dict())
yield DictFilter(self._module_attributes_dict())
for star_module in self.star_imports():
yield next(star_module.get_filters(search_global))
# I'm not sure if the star import cache is really that effective anymore
# with all the other really fast import caches. Recheck. Also we would need
# to push the star imports into Evaluator.modules, if we reenable this.
@evaluator_method_cache([])
def star_imports(self):
modules = []
for i in self.tree_node.iter_imports():
if i.is_star_import():
name = i.get_paths()[-1][-1]
new = imports.infer_import(self, name)
for module in new:
if isinstance(module, ModuleContext):
modules += module.star_imports()
modules += new
return modules
@evaluator_method_cache()
def _module_attributes_dict(self):
names = ['__file__', '__package__', '__doc__', '__name__']
# All the additional module attributes are strings.
return dict((n, ModuleAttributeName(self, n)) for n in names)
@property
def _string_name(self):
""" This is used for the goto functions. """
if self._path is None:
return '' # no path -> empty name
else:
sep = (re.escape(os.path.sep),) * 2
r = re.search(r'([^%s]*?)(%s__init__)?(\.py|\.so)?$' % sep, self._path)
# Remove PEP 3149 names
return re.sub('\.[a-z]+-\d{2}[mud]{0,3}$', '', r.group(1))
@property
@evaluator_method_cache()
def name(self):
return ModuleName(self, self._string_name)
def _get_init_directory(self):
"""
:return: The path to the directory of a package. None in case it's not
a package.
"""
for suffix, _, _ in imp.get_suffixes():
ending = '__init__' + suffix
py__file__ = self.py__file__()
if py__file__ is not None and py__file__.endswith(ending):
# Remove the ending, including the separator.
return self.py__file__()[:-len(ending) - 1]
return None
def py__name__(self):
for name, module in self.evaluator.modules.items():
if module == self and name != '':
return name
return '__main__'
def py__file__(self):
"""
In contrast to Python's __file__ can be None.
"""
if self._path is None:
return None
return os.path.abspath(self._path)
def py__package__(self):
if self._get_init_directory() is None:
return re.sub(r'\.?[^\.]+$', '', self.py__name__())
else:
return self.py__name__()
def _py__path__(self):
search_path = self.evaluator.sys_path
init_path = self.py__file__()
if os.path.basename(init_path) == '__init__.py':
with open(init_path, 'rb') as f:
content = python_bytes_to_unicode(f.read(), errors='replace')
# these are strings that need to be used for namespace packages,
# the first one is ``pkgutil``, the second ``pkg_resources``.
options = ('declare_namespace(__name__)', 'extend_path(__path__')
if options[0] in content or options[1] in content:
# It is a namespace, now try to find the rest of the
# modules on sys_path or whatever the search_path is.
paths = set()
for s in search_path:
other = os.path.join(s, self.name.string_name)
if os.path.isdir(other):
paths.add(other)
if paths:
return list(paths)
# TODO I'm not sure if this is how nested namespace
# packages work. The tests are not really good enough to
# show that.
# Default to this.
return [self._get_init_directory()]
@property
def py__path__(self):
"""
Not seen here, since it's a property. The callback actually uses a
variable, so use it like::
foo.py__path__(sys_path)
In case of a package, this returns Python's __path__ attribute, which
is a list of paths (strings).
Raises an AttributeError if the module is not a package.
"""
path = self._get_init_directory()
if path is None:
raise AttributeError('Only packages have __path__ attributes.')
else:
return self._py__path__
@evaluator_method_cache()
def _sub_modules_dict(self):
"""
Lists modules in the directory of this module (if this module is a
package).
"""
path = self._path
names = {}
if path is not None and path.endswith(os.path.sep + '__init__.py'):
mods = pkgutil.iter_modules([os.path.dirname(path)])
for module_loader, name, is_pkg in mods:
# It's obviously a relative import to the current module.
names[name] = imports.SubModuleName(self, name)
# TODO add something like this in the future, its cleaner than the
# import hacks.
# ``os.path`` is a hardcoded exception, because it's a
# ``sys.modules`` modification.
# if str(self.name) == 'os':
# names.append(Name('path', parent_context=self))
return names
def py__class__(self):
return compiled.get_special_object(self.evaluator, 'MODULE_CLASS')
def __repr__(self):
return "<%s: %s@%s-%s>" % (
self.__class__.__name__, self._string_name,
self.tree_node.start_pos[0], self.tree_node.end_pos[0])
class ImplicitNSName(AbstractNameDefinition):
"""
Accessing names for implicit namespace packages should infer to nothing.
This object will prevent Jedi from raising exceptions
"""
def __init__(self, implicit_ns_context, string_name):
self.implicit_ns_context = implicit_ns_context
self.string_name = string_name
def infer(self):
return []
def get_root_context(self):
return self.implicit_ns_context
class ImplicitNamespaceContext(use_metaclass(CachedMetaClass, context.TreeContext)):
"""
Provides support for implicit namespace packages
"""
api_type = 'module'
parent_context = None
def __init__(self, evaluator, fullname):
super(ImplicitNamespaceContext, self).__init__(evaluator, parent_context=None)
self.evaluator = evaluator
self.fullname = fullname
def get_filters(self, search_global, until_position=None, origin_scope=None):
yield DictFilter(self._sub_modules_dict())
@property
@evaluator_method_cache()
def name(self):
string_name = self.py__package__().rpartition('.')[-1]
return ImplicitNSName(self, string_name)
def py__file__(self):
return None
def py__package__(self):
"""Return the fullname
"""
return self.fullname
@property
def py__path__(self):
return lambda: [self.paths]
@evaluator_method_cache()
def _sub_modules_dict(self):
names = {}
paths = self.paths
file_names = chain.from_iterable(os.listdir(path) for path in paths)
mods = [
file_name.rpartition('.')[0] if '.' in file_name else file_name
for file_name in file_names
if file_name != '__pycache__'
]
for name in mods:
names[name] = imports.SubModuleName(self, name)
return names

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@ -0,0 +1,110 @@
"""An adapted copy of relevant site-packages functionality from Python stdlib.
This file contains some functions related to handling site-packages in Python
with jedi-specific modifications:
- the functions operate on sys_path argument rather than global sys.path
- in .pth files "import ..." lines that allow execution of arbitrary code are
skipped to prevent code injection into jedi interpreter
"""
# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
# 2011, 2012, 2013, 2014, 2015 Python Software Foundation; All Rights Reserved
from __future__ import print_function
import sys
import os
def makepath(*paths):
dir = os.path.join(*paths)
try:
dir = os.path.abspath(dir)
except OSError:
pass
return dir, os.path.normcase(dir)
def _init_pathinfo(sys_path):
"""Return a set containing all existing directory entries from sys_path"""
d = set()
for dir in sys_path:
try:
if os.path.isdir(dir):
dir, dircase = makepath(dir)
d.add(dircase)
except TypeError:
continue
return d
def addpackage(sys_path, sitedir, name, known_paths):
"""Process a .pth file within the site-packages directory:
For each line in the file, either combine it with sitedir to a path
and add that to known_paths, or execute it if it starts with 'import '.
"""
if known_paths is None:
known_paths = _init_pathinfo(sys_path)
reset = 1
else:
reset = 0
fullname = os.path.join(sitedir, name)
try:
f = open(fullname, "r")
except OSError:
return
with f:
for n, line in enumerate(f):
if line.startswith("#"):
continue
try:
if line.startswith(("import ", "import\t")):
# Change by immerrr: don't evaluate import lines to prevent
# code injection into jedi through pth files.
#
# exec(line)
continue
line = line.rstrip()
dir, dircase = makepath(sitedir, line)
if not dircase in known_paths and os.path.exists(dir):
sys_path.append(dir)
known_paths.add(dircase)
except Exception:
print("Error processing line {:d} of {}:\n".format(n+1, fullname),
file=sys.stderr)
import traceback
for record in traceback.format_exception(*sys.exc_info()):
for line in record.splitlines():
print(' '+line, file=sys.stderr)
print("\nRemainder of file ignored", file=sys.stderr)
break
if reset:
known_paths = None
return known_paths
def addsitedir(sys_path, sitedir, known_paths=None):
"""Add 'sitedir' argument to sys_path if missing and handle .pth files in
'sitedir'"""
if known_paths is None:
known_paths = _init_pathinfo(sys_path)
reset = 1
else:
reset = 0
sitedir, sitedircase = makepath(sitedir)
if not sitedircase in known_paths:
sys_path.append(sitedir) # Add path component
known_paths.add(sitedircase)
try:
names = os.listdir(sitedir)
except OSError:
return
names = [name for name in names if name.endswith(".pth")]
for name in sorted(names):
addpackage(sys_path, sitedir, name, known_paths)
if reset:
known_paths = None
return known_paths

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"""
Implementations of standard library functions, because it's not possible to
understand them with Jedi.
To add a new implementation, create a function and add it to the
``_implemented`` dict at the bottom of this module.
Note that this module exists only to implement very specific functionality in
the standard library. The usual way to understand the standard library is the
compiled module that returns the types for C-builtins.
"""
import collections
import re
from jedi.common import unite
from jedi.evaluate import compiled
from jedi.evaluate import representation as er
from jedi.evaluate.instance import InstanceFunctionExecution, \
AbstractInstanceContext, CompiledInstance, BoundMethod, \
AnonymousInstanceFunctionExecution
from jedi.evaluate import iterable
from jedi import debug
from jedi.evaluate import precedence
from jedi.evaluate import param
from jedi.evaluate import analysis
from jedi.evaluate.context import LazyTreeContext, ContextualizedNode
# Now this is all part of fake tuples in Jedi. However super doesn't work on
# __init__ and __new__ doesn't work at all. So adding this to nametuples is
# just the easiest way.
_NAMEDTUPLE_INIT = """
def __init__(_cls, {arg_list}):
'A helper function for namedtuple.'
self.__iterable = ({arg_list})
def __iter__(self):
for i in self.__iterable:
yield i
def __getitem__(self, y):
return self.__iterable[y]
"""
class NotInStdLib(LookupError):
pass
def execute(evaluator, obj, arguments):
if isinstance(obj, BoundMethod):
raise NotInStdLib()
try:
obj_name = obj.name.string_name
except AttributeError:
pass
else:
if obj.parent_context == evaluator.BUILTINS:
module_name = 'builtins'
elif isinstance(obj.parent_context, er.ModuleContext):
module_name = obj.parent_context.name.string_name
else:
module_name = ''
# for now we just support builtin functions.
try:
func = _implemented[module_name][obj_name]
except KeyError:
pass
else:
return func(evaluator, obj, arguments)
raise NotInStdLib()
def _follow_param(evaluator, arguments, index):
try:
key, lazy_context = list(arguments.unpack())[index]
except IndexError:
return set()
else:
return lazy_context.infer()
def argument_clinic(string, want_obj=False, want_context=False, want_arguments=False):
"""
Works like Argument Clinic (PEP 436), to validate function params.
"""
clinic_args = []
allow_kwargs = False
optional = False
while string:
# Optional arguments have to begin with a bracket. And should always be
# at the end of the arguments. This is therefore not a proper argument
# clinic implementation. `range()` for exmple allows an optional start
# value at the beginning.
match = re.match('(?:(?:(\[),? ?|, ?|)(\w+)|, ?/)\]*', string)
string = string[len(match.group(0)):]
if not match.group(2): # A slash -> allow named arguments
allow_kwargs = True
continue
optional = optional or bool(match.group(1))
word = match.group(2)
clinic_args.append((word, optional, allow_kwargs))
def f(func):
def wrapper(evaluator, obj, arguments):
debug.dbg('builtin start %s' % obj, color='MAGENTA')
try:
lst = list(arguments.eval_argument_clinic(clinic_args))
except ValueError:
return set()
else:
kwargs = {}
if want_context:
kwargs['context'] = arguments.context
if want_obj:
kwargs['obj'] = obj
if want_arguments:
kwargs['arguments'] = arguments
return func(evaluator, *lst, **kwargs)
finally:
debug.dbg('builtin end', color='MAGENTA')
return wrapper
return f
@argument_clinic('iterator[, default], /')
def builtins_next(evaluator, iterators, defaults):
"""
TODO this function is currently not used. It's a stab at implementing next
in a different way than fake objects. This would be a bit more flexible.
"""
if evaluator.python_version[0] == 2:
name = 'next'
else:
name = '__next__'
types = set()
for iterator in iterators:
if isinstance(iterator, AbstractInstanceContext):
for filter in iterator.get_filters(include_self_names=True):
for n in filter.get(name):
for context in n.infer():
types |= context.execute_evaluated()
if types:
return types
return defaults
@argument_clinic('object, name[, default], /')
def builtins_getattr(evaluator, objects, names, defaults=None):
# follow the first param
for obj in objects:
for name in names:
if precedence.is_string(name):
return obj.py__getattribute__(name.obj)
else:
debug.warning('getattr called without str')
continue
return set()
@argument_clinic('object[, bases, dict], /')
def builtins_type(evaluator, objects, bases, dicts):
if bases or dicts:
# It's a type creation... maybe someday...
return set()
else:
return set([o.py__class__() for o in objects])
class SuperInstance(AbstractInstanceContext):
"""To be used like the object ``super`` returns."""
def __init__(self, evaluator, cls):
su = cls.py_mro()[1]
super().__init__(evaluator, su and su[0] or self)
@argument_clinic('[type[, obj]], /', want_context=True)
def builtins_super(evaluator, types, objects, context):
# TODO make this able to detect multiple inheritance super
if isinstance(context, (InstanceFunctionExecution,
AnonymousInstanceFunctionExecution)):
su = context.instance.py__class__().py__bases__()
return unite(context.execute_evaluated() for context in su[0].infer())
return set()
@argument_clinic('sequence, /', want_obj=True, want_arguments=True)
def builtins_reversed(evaluator, sequences, obj, arguments):
# While we could do without this variable (just by using sequences), we
# want static analysis to work well. Therefore we need to generated the
# values again.
key, lazy_context = next(arguments.unpack())
cn = None
if isinstance(lazy_context, LazyTreeContext):
# TODO access private
cn = ContextualizedNode(lazy_context._context, lazy_context.data)
ordered = list(iterable.py__iter__(evaluator, sequences, cn))
rev = list(reversed(ordered))
# Repack iterator values and then run it the normal way. This is
# necessary, because `reversed` is a function and autocompletion
# would fail in certain cases like `reversed(x).__iter__` if we
# just returned the result directly.
seq = iterable.FakeSequence(evaluator, 'list', rev)
arguments = param.ValuesArguments([[seq]])
return set([CompiledInstance(evaluator, evaluator.BUILTINS, obj, arguments)])
@argument_clinic('obj, type, /', want_arguments=True)
def builtins_isinstance(evaluator, objects, types, arguments):
bool_results = set([])
for o in objects:
try:
mro_func = o.py__class__().py__mro__
except AttributeError:
# This is temporary. Everything should have a class attribute in
# Python?! Maybe we'll leave it here, because some numpy objects or
# whatever might not.
return set([compiled.create(True), compiled.create(False)])
mro = mro_func()
for cls_or_tup in types:
if cls_or_tup.is_class():
bool_results.add(cls_or_tup in mro)
elif cls_or_tup.name.string_name == 'tuple' \
and cls_or_tup.get_root_context() == evaluator.BUILTINS:
# Check for tuples.
classes = unite(
lazy_context.infer()
for lazy_context in cls_or_tup.py__iter__()
)
bool_results.add(any(cls in mro for cls in classes))
else:
_, lazy_context = list(arguments.unpack())[1]
if isinstance(lazy_context, LazyTreeContext):
node = lazy_context.data
message = 'TypeError: isinstance() arg 2 must be a ' \
'class, type, or tuple of classes and types, ' \
'not %s.' % cls_or_tup
analysis.add(lazy_context._context, 'type-error-isinstance', node, message)
return set(compiled.create(evaluator, x) for x in bool_results)
def collections_namedtuple(evaluator, obj, arguments):
"""
Implementation of the namedtuple function.
This has to be done by processing the namedtuple class template and
evaluating the result.
.. note:: |jedi| only supports namedtuples on Python >2.6.
"""
# Namedtuples are not supported on Python 2.6
if not hasattr(collections, '_class_template'):
return set()
# Process arguments
# TODO here we only use one of the types, we should use all.
name = list(_follow_param(evaluator, arguments, 0))[0].obj
_fields = list(_follow_param(evaluator, arguments, 1))[0]
if isinstance(_fields, compiled.CompiledObject):
fields = _fields.obj.replace(',', ' ').split()
elif isinstance(_fields, iterable.AbstractSequence):
fields = [
v.obj
for lazy_context in _fields.py__iter__()
for v in lazy_context.infer() if hasattr(v, 'obj')
]
else:
return set()
base = collections._class_template
base += _NAMEDTUPLE_INIT
# Build source
source = base.format(
typename=name,
field_names=tuple(fields),
num_fields=len(fields),
arg_list = repr(tuple(fields)).replace("'", "")[1:-1],
repr_fmt=', '.join(collections._repr_template.format(name=name) for name in fields),
field_defs='\n'.join(collections._field_template.format(index=index, name=name)
for index, name in enumerate(fields))
)
# Parse source
module = evaluator.grammar.parse(source)
generated_class = next(module.iter_classdefs())
parent_context = er.ModuleContext(evaluator, module, '')
return set([er.ClassContext(evaluator, generated_class, parent_context)])
@argument_clinic('first, /')
def _return_first_param(evaluator, firsts):
return firsts
_implemented = {
'builtins': {
'getattr': builtins_getattr,
'type': builtins_type,
'super': builtins_super,
'reversed': builtins_reversed,
'isinstance': builtins_isinstance,
},
'copy': {
'copy': _return_first_param,
'deepcopy': _return_first_param,
},
'json': {
'load': lambda *args: set(),
'loads': lambda *args: set(),
},
'collections': {
'namedtuple': collections_namedtuple,
},
}

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import glob
import os
import sys
import imp
from jedi.evaluate.site import addsitedir
from jedi._compatibility import exec_function, unicode
from jedi.evaluate.cache import evaluator_function_cache
from jedi.evaluate.compiled import CompiledObject
from jedi.evaluate.context import ContextualizedNode
from jedi import settings
from jedi import debug
from jedi import common
def get_venv_path(venv):
"""Get sys.path for specified virtual environment."""
sys_path = _get_venv_path_dirs(venv)
with common.ignored(ValueError):
sys_path.remove('')
sys_path = _get_sys_path_with_egglinks(sys_path)
# As of now, get_venv_path_dirs does not scan built-in pythonpath and
# user-local site-packages, let's approximate them using path from Jedi
# interpreter.
return sys_path + sys.path
def _get_sys_path_with_egglinks(sys_path):
"""Find all paths including those referenced by egg-links.
Egg-link-referenced directories are inserted into path immediately before
the directory on which their links were found. Such directories are not
taken into consideration by normal import mechanism, but they are traversed
when doing pkg_resources.require.
"""
result = []
for p in sys_path:
# pkg_resources does not define a specific order for egg-link files
# using os.listdir to enumerate them, we're sorting them to have
# reproducible tests.
for egg_link in sorted(glob.glob(os.path.join(p, '*.egg-link'))):
with open(egg_link) as fd:
for line in fd:
line = line.strip()
if line:
result.append(os.path.join(p, line))
# pkg_resources package only interprets the first
# non-empty line in egg-link files.
break
result.append(p)
return result
def _get_venv_path_dirs(venv):
"""Get sys.path for venv without starting up the interpreter."""
venv = os.path.abspath(venv)
sitedir = _get_venv_sitepackages(venv)
sys_path = []
addsitedir(sys_path, sitedir)
return sys_path
def _get_venv_sitepackages(venv):
if os.name == 'nt':
p = os.path.join(venv, 'lib', 'site-packages')
else:
p = os.path.join(venv, 'lib', 'python%d.%d' % sys.version_info[:2],
'site-packages')
return p
def _execute_code(module_path, code):
c = "import os; from os.path import *; result=%s"
variables = {'__file__': module_path}
try:
exec_function(c % code, variables)
except Exception:
debug.warning('sys.path manipulation detected, but failed to evaluate.')
else:
try:
res = variables['result']
if isinstance(res, str):
return [os.path.abspath(res)]
except KeyError:
pass
return []
def _paths_from_assignment(module_context, expr_stmt):
"""
Extracts the assigned strings from an assignment that looks as follows::
>>> sys.path[0:0] = ['module/path', 'another/module/path']
This function is in general pretty tolerant (and therefore 'buggy').
However, it's not a big issue usually to add more paths to Jedi's sys_path,
because it will only affect Jedi in very random situations and by adding
more paths than necessary, it usually benefits the general user.
"""
for assignee, operator in zip(expr_stmt.children[::2], expr_stmt.children[1::2]):
try:
assert operator in ['=', '+=']
assert assignee.type in ('power', 'atom_expr') and \
len(assignee.children) > 1
c = assignee.children
assert c[0].type == 'name' and c[0].value == 'sys'
trailer = c[1]
assert trailer.children[0] == '.' and trailer.children[1].value == 'path'
# TODO Essentially we're not checking details on sys.path
# manipulation. Both assigment of the sys.path and changing/adding
# parts of the sys.path are the same: They get added to the current
# sys.path.
"""
execution = c[2]
assert execution.children[0] == '['
subscript = execution.children[1]
assert subscript.type == 'subscript'
assert ':' in subscript.children
"""
except AssertionError:
continue
from jedi.evaluate.iterable import py__iter__
from jedi.evaluate.precedence import is_string
cn = ContextualizedNode(module_context.create_context(expr_stmt), expr_stmt)
for lazy_context in py__iter__(module_context.evaluator, cn.infer(), cn):
for context in lazy_context.infer():
if is_string(context):
yield context.obj
def _paths_from_list_modifications(module_path, trailer1, trailer2):
""" extract the path from either "sys.path.append" or "sys.path.insert" """
# Guarantee that both are trailers, the first one a name and the second one
# a function execution with at least one param.
if not (trailer1.type == 'trailer' and trailer1.children[0] == '.'
and trailer2.type == 'trailer' and trailer2.children[0] == '('
and len(trailer2.children) == 3):
return []
name = trailer1.children[1].value
if name not in ['insert', 'append']:
return []
arg = trailer2.children[1]
if name == 'insert' and len(arg.children) in (3, 4): # Possible trailing comma.
arg = arg.children[2]
return _execute_code(module_path, arg.get_code())
def _check_module(module_context):
"""
Detect sys.path modifications within module.
"""
def get_sys_path_powers(names):
for name in names:
power = name.parent.parent
if power.type in ('power', 'atom_expr'):
c = power.children
if c[0].type == 'name' and c[0].value == 'sys' \
and c[1].type == 'trailer':
n = c[1].children[1]
if n.type == 'name' and n.value == 'path':
yield name, power
sys_path = list(module_context.evaluator.sys_path) # copy
if isinstance(module_context, CompiledObject):
return sys_path
try:
possible_names = module_context.tree_node.get_used_names()['path']
except KeyError:
pass
else:
for name, power in get_sys_path_powers(possible_names):
expr_stmt = power.parent
if len(power.children) >= 4:
sys_path.extend(
_paths_from_list_modifications(
module_context.py__file__(), *power.children[2:4]
)
)
elif expr_stmt is not None and expr_stmt.type == 'expr_stmt':
sys_path.extend(_paths_from_assignment(module_context, expr_stmt))
return sys_path
@evaluator_function_cache(default=[])
def sys_path_with_modifications(evaluator, module_context):
path = module_context.py__file__()
if path is None:
# Support for modules without a path is bad, therefore return the
# normal path.
return list(evaluator.sys_path)
curdir = os.path.abspath(os.curdir)
#TODO why do we need a chdir?
with common.ignored(OSError):
os.chdir(os.path.dirname(path))
buildout_script_paths = set()
result = _check_module(module_context)
result += _detect_django_path(path)
for buildout_script_path in _get_buildout_script_paths(path):
for path in _get_paths_from_buildout_script(evaluator, buildout_script_path):
buildout_script_paths.add(path)
# cleanup, back to old directory
os.chdir(curdir)
return list(result) + list(buildout_script_paths)
def _get_paths_from_buildout_script(evaluator, buildout_script_path):
try:
module_node = evaluator.grammar.parse(
path=buildout_script_path,
cache=True,
cache_path=settings.cache_directory
)
except IOError:
debug.warning('Error trying to read buildout_script: %s', buildout_script_path)
return
from jedi.evaluate.representation import ModuleContext
for path in _check_module(ModuleContext(evaluator, module_node, buildout_script_path)):
yield path
def traverse_parents(path):
while True:
new = os.path.dirname(path)
if new == path:
return
path = new
yield path
def _get_parent_dir_with_file(path, filename):
for parent in traverse_parents(path):
if os.path.isfile(os.path.join(parent, filename)):
return parent
return None
def _detect_django_path(module_path):
""" Detects the path of the very well known Django library (if used) """
result = []
for parent in traverse_parents(module_path):
with common.ignored(IOError):
with open(parent + os.path.sep + 'manage.py'):
debug.dbg('Found django path: %s', module_path)
result.append(parent)
return result
def _get_buildout_script_paths(module_path):
"""
if there is a 'buildout.cfg' file in one of the parent directories of the
given module it will return a list of all files in the buildout bin
directory that look like python files.
:param module_path: absolute path to the module.
:type module_path: str
"""
project_root = _get_parent_dir_with_file(module_path, 'buildout.cfg')
if not project_root:
return []
bin_path = os.path.join(project_root, 'bin')
if not os.path.exists(bin_path):
return []
extra_module_paths = []
for filename in os.listdir(bin_path):
try:
filepath = os.path.join(bin_path, filename)
with open(filepath, 'r') as f:
firstline = f.readline()
if firstline.startswith('#!') and 'python' in firstline:
extra_module_paths.append(filepath)
except (UnicodeDecodeError, IOError) as e:
# Probably a binary file; permission error or race cond. because file got deleted
# ignore
debug.warning(unicode(e))
continue
return extra_module_paths
def dotted_path_in_sys_path(sys_path, module_path):
"""
Returns the dotted path inside a sys.path.
"""
# First remove the suffix.
for suffix, _, _ in imp.get_suffixes():
if module_path.endswith(suffix):
module_path = module_path[:-len(suffix)]
break
else:
# There should always be a suffix in a valid Python file on the path.
return None
if module_path.startswith(os.path.sep):
# The paths in sys.path most of the times don't end with a slash.
module_path = module_path[1:]
for p in sys_path:
if module_path.startswith(p):
rest = module_path[len(p):]
if rest:
split = rest.split(os.path.sep)
for string in split:
if not string or '.' in string:
return None
return '.'.join(split)
return None

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import textwrap
from inspect import cleandoc
from jedi._compatibility import literal_eval, is_py3
from parso.python import tree
_EXECUTE_NODES = set([
'funcdef', 'classdef', 'import_from', 'import_name', 'test', 'or_test',
'and_test', 'not_test', 'comparison', 'expr', 'xor_expr', 'and_expr',
'shift_expr', 'arith_expr', 'atom_expr', 'term', 'factor', 'power', 'atom'
])
_FLOW_KEYWORDS = (
'try', 'except', 'finally', 'else', 'if', 'elif', 'with', 'for', 'while'
)
def get_executable_nodes(node, last_added=False):
"""
For static analysis.
"""
result = []
typ = node.type
if typ == 'name':
next_leaf = node.get_next_leaf()
if last_added is False and node.parent.type != 'param' and next_leaf != '=':
result.append(node)
elif typ == 'expr_stmt':
# I think evaluating the statement (and possibly returned arrays),
# should be enough for static analysis.
result.append(node)
for child in node.children:
result += get_executable_nodes(child, last_added=True)
elif typ == 'decorator':
# decorator
if node.children[-2] == ')':
node = node.children[-3]
if node != '(':
result += get_executable_nodes(node)
else:
try:
children = node.children
except AttributeError:
pass
else:
if node.type in _EXECUTE_NODES and not last_added:
result.append(node)
for child in children:
result += get_executable_nodes(child, last_added)
return result
def get_comp_fors(comp_for):
yield comp_for
last = comp_for.children[-1]
while True:
if last.type == 'comp_for':
yield last
elif not last.type == 'comp_if':
break
last = last.children[-1]
def for_stmt_defines_one_name(for_stmt):
"""
Returns True if only one name is returned: ``for x in y``.
Returns False if the for loop is more complicated: ``for x, z in y``.
:returns: bool
"""
return for_stmt.children[1].type == 'name'
def get_flow_branch_keyword(flow_node, node):
start_pos = node.start_pos
if not (flow_node.start_pos < start_pos <= flow_node.end_pos):
raise ValueError('The node is not part of the flow.')
keyword = None
for i, child in enumerate(flow_node.children):
if start_pos < child.start_pos:
return keyword
first_leaf = child.get_first_leaf()
if first_leaf in _FLOW_KEYWORDS:
keyword = first_leaf
return 0
def get_statement_of_position(node, pos):
for c in node.children:
if c.start_pos <= pos <= c.end_pos:
if c.type not in ('decorated', 'simple_stmt', 'suite') \
and not isinstance(c, (tree.Flow, tree.ClassOrFunc)):
return c
else:
try:
return get_statement_of_position(c, pos)
except AttributeError:
pass # Must be a non-scope
return None
def clean_scope_docstring(scope_node):
""" Returns a cleaned version of the docstring token. """
node = scope_node.get_doc_node()
if node is not None:
# TODO We have to check next leaves until there are no new
# leaves anymore that might be part of the docstring. A
# docstring can also look like this: ``'foo' 'bar'
# Returns a literal cleaned version of the ``Token``.
cleaned = cleandoc(safe_literal_eval(node.value))
# Since we want the docstr output to be always unicode, just
# force it.
if is_py3 or isinstance(cleaned, unicode):
return cleaned
else:
return unicode(cleaned, 'UTF-8', 'replace')
return ''
def safe_literal_eval(value):
first_two = value[:2].lower()
if first_two[0] == 'f' or first_two in ('fr', 'rf'):
# literal_eval is not able to resovle f literals. We have to do that
# manually, but that's right now not implemented.
return ''
try:
return literal_eval(value)
except SyntaxError:
# It's possible to create syntax errors with literals like rb'' in
# Python 2. This should not be possible and in that case just return an
# empty string.
# Before Python 3.3 there was a more strict definition in which order
# you could define literals.
return ''
def get_call_signature(funcdef, width=72, call_string=None):
"""
Generate call signature of this function.
:param width: Fold lines if a line is longer than this value.
:type width: int
:arg func_name: Override function name when given.
:type func_name: str
:rtype: str
"""
# Lambdas have no name.
if call_string is None:
if funcdef.type == 'lambdef':
call_string = '<lambda>'
else:
call_string = funcdef.name.value
if funcdef.type == 'lambdef':
p = '(' + ''.join(param.get_code() for param in funcdef.get_params()).strip() + ')'
else:
p = funcdef.children[2].get_code()
code = call_string + p
return '\n'.join(textwrap.wrap(code, width))
def get_doc_with_call_signature(scope_node):
"""
Return a document string including call signature.
"""
call_signature = None
if scope_node.type == 'classdef':
for funcdef in scope_node.iter_funcdefs():
if funcdef.name.value == '__init__':
call_signature = \
get_call_signature(funcdef, call_string=scope_node.name.value)
elif scope_node.type in ('funcdef', 'lambdef'):
call_signature = get_call_signature(scope_node)
doc = clean_scope_docstring(scope_node)
if call_signature is None:
return doc
return '%s\n\n%s' % (call_signature, doc)
def move(node, line_offset):
"""
Move the `Node` start_pos.
"""
try:
children = node.children
except AttributeError:
node.line += line_offset
else:
for c in children:
move(c, line_offset)
def get_following_comment_same_line(node):
"""
returns (as string) any comment that appears on the same line,
after the node, including the #
"""
try:
if node.type == 'for_stmt':
whitespace = node.children[5].get_first_leaf().prefix
elif node.type == 'with_stmt':
whitespace = node.children[3].get_first_leaf().prefix
else:
whitespace = node.get_last_leaf().get_next_leaf().prefix
except AttributeError:
return None
except ValueError:
# TODO in some particular cases, the tree doesn't seem to be linked
# correctly
return None
if "#" not in whitespace:
return None
comment = whitespace[whitespace.index("#"):]
if "\r" in comment:
comment = comment[:comment.index("\r")]
if "\n" in comment:
comment = comment[:comment.index("\n")]
return comment
def is_scope(node):
return node.type in ('file_input', 'classdef', 'funcdef', 'lambdef', 'comp_for')
def get_parent_scope(node, include_flows=False):
"""
Returns the underlying scope.
"""
scope = node.parent
while scope is not None:
if include_flows and isinstance(scope, tree.Flow):
return scope
if is_scope(scope):
break
scope = scope.parent
return scope

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"""
Introduce some basic refactoring functions to |jedi|. This module is still in a
very early development stage and needs much testing and improvement.
.. warning:: I won't do too much here, but if anyone wants to step in, please
do. Refactoring is none of my priorities
It uses the |jedi| `API <plugin-api.html>`_ and supports currently the
following functions (sometimes bug-prone):
- rename
- extract variable
- inline variable
"""
import difflib
from jedi import common
from parso import python_bytes_to_unicode, split_lines
from jedi.evaluate import helpers
class Refactoring(object):
def __init__(self, change_dct):
"""
:param change_dct: dict(old_path=(new_path, old_lines, new_lines))
"""
self.change_dct = change_dct
def old_files(self):
dct = {}
for old_path, (new_path, old_l, new_l) in self.change_dct.items():
dct[old_path] = '\n'.join(old_l)
return dct
def new_files(self):
dct = {}
for old_path, (new_path, old_l, new_l) in self.change_dct.items():
dct[new_path] = '\n'.join(new_l)
return dct
def diff(self):
texts = []
for old_path, (new_path, old_l, new_l) in self.change_dct.items():
if old_path:
udiff = difflib.unified_diff(old_l, new_l)
else:
udiff = difflib.unified_diff(old_l, new_l, old_path, new_path)
texts.append('\n'.join(udiff))
return '\n'.join(texts)
def rename(script, new_name):
""" The `args` / `kwargs` params are the same as in `api.Script`.
:param operation: The refactoring operation to execute.
:type operation: str
:type source: str
:return: list of changed lines/changed files
"""
return Refactoring(_rename(script.usages(), new_name))
def _rename(names, replace_str):
""" For both rename and inline. """
order = sorted(names, key=lambda x: (x.module_path, x.line, x.column),
reverse=True)
def process(path, old_lines, new_lines):
if new_lines is not None: # goto next file, save last
dct[path] = path, old_lines, new_lines
dct = {}
current_path = object()
new_lines = old_lines = None
for name in order:
if name.in_builtin_module():
continue
if current_path != name.module_path:
current_path = name.module_path
process(current_path, old_lines, new_lines)
if current_path is not None:
# None means take the source that is a normal param.
with open(current_path) as f:
source = f.read()
new_lines = split_lines(python_bytes_to_unicode(source))
old_lines = new_lines[:]
nr, indent = name.line, name.column
line = new_lines[nr - 1]
new_lines[nr - 1] = line[:indent] + replace_str + \
line[indent + len(name.name):]
process(current_path, old_lines, new_lines)
return dct
def extract(script, new_name):
""" The `args` / `kwargs` params are the same as in `api.Script`.
:param operation: The refactoring operation to execute.
:type operation: str
:type source: str
:return: list of changed lines/changed files
"""
new_lines = split_lines(python_bytes_to_unicode(script.source))
old_lines = new_lines[:]
user_stmt = script._parser.user_stmt()
# TODO care for multiline extracts
dct = {}
if user_stmt:
pos = script._pos
line_index = pos[0] - 1
arr, index = helpers.array_for_pos(user_stmt, pos)
if arr is not None:
start_pos = arr[index].start_pos
end_pos = arr[index].end_pos
# take full line if the start line is different from end line
e = end_pos[1] if end_pos[0] == start_pos[0] else None
start_line = new_lines[start_pos[0] - 1]
text = start_line[start_pos[1]:e]
for l in range(start_pos[0], end_pos[0] - 1):
text += '\n' + l
if e is None:
end_line = new_lines[end_pos[0] - 1]
text += '\n' + end_line[:end_pos[1]]
# remove code from new lines
t = text.lstrip()
del_start = start_pos[1] + len(text) - len(t)
text = t.rstrip()
del_end = len(t) - len(text)
if e is None:
new_lines[end_pos[0] - 1] = end_line[end_pos[1] - del_end:]
e = len(start_line)
else:
e = e - del_end
start_line = start_line[:del_start] + new_name + start_line[e:]
new_lines[start_pos[0] - 1] = start_line
new_lines[start_pos[0]:end_pos[0] - 1] = []
# add parentheses in multiline case
open_brackets = ['(', '[', '{']
close_brackets = [')', ']', '}']
if '\n' in text and not (text[0] in open_brackets and text[-1] ==
close_brackets[open_brackets.index(text[0])]):
text = '(%s)' % text
# add new line before statement
indent = user_stmt.start_pos[1]
new = "%s%s = %s" % (' ' * indent, new_name, text)
new_lines.insert(line_index, new)
dct[script.path] = script.path, old_lines, new_lines
return Refactoring(dct)
def inline(script):
"""
:type script: api.Script
"""
new_lines = split_lines(python_bytes_to_unicode(script.source))
dct = {}
definitions = script.goto_assignments()
with common.ignored(AssertionError):
assert len(definitions) == 1
stmt = definitions[0]._definition
usages = script.usages()
inlines = [r for r in usages
if not stmt.start_pos <= (r.line, r.column) <= stmt.end_pos]
inlines = sorted(inlines, key=lambda x: (x.module_path, x.line, x.column),
reverse=True)
expression_list = stmt.expression_list()
# don't allow multiline refactorings for now.
assert stmt.start_pos[0] == stmt.end_pos[0]
index = stmt.start_pos[0] - 1
line = new_lines[index]
replace_str = line[expression_list[0].start_pos[1]:stmt.end_pos[1] + 1]
replace_str = replace_str.strip()
# tuples need parentheses
if expression_list and isinstance(expression_list[0], pr.Array):
arr = expression_list[0]
if replace_str[0] not in ['(', '[', '{'] and len(arr) > 1:
replace_str = '(%s)' % replace_str
# if it's the only assignment, remove the statement
if len(stmt.get_defined_names()) == 1:
line = line[:stmt.start_pos[1]] + line[stmt.end_pos[1]:]
dct = _rename(inlines, replace_str)
# remove the empty line
new_lines = dct[script.path][2]
if line.strip():
new_lines[index] = line
else:
new_lines.pop(index)
return Refactoring(dct)

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"""
This module contains variables with global |jedi| settings. To change the
behavior of |jedi|, change the variables defined in :mod:`jedi.settings`.
Plugins should expose an interface so that the user can adjust the
configuration.
Example usage::
from jedi import settings
settings.case_insensitive_completion = True
Completion output
~~~~~~~~~~~~~~~~~
.. autodata:: case_insensitive_completion
.. autodata:: add_bracket_after_function
.. autodata:: no_completion_duplicates
Filesystem cache
~~~~~~~~~~~~~~~~
.. autodata:: cache_directory
.. autodata:: use_filesystem_cache
Parser
~~~~~~
.. autodata:: fast_parser
Dynamic stuff
~~~~~~~~~~~~~
.. autodata:: dynamic_array_additions
.. autodata:: dynamic_params
.. autodata:: dynamic_params_for_other_modules
.. autodata:: additional_dynamic_modules
.. autodata:: auto_import_modules
Caching
~~~~~~~
.. autodata:: call_signatures_validity
"""
import os
import platform
# ----------------
# completion output settings
# ----------------
case_insensitive_completion = True
"""
The completion is by default case insensitive.
"""
add_bracket_after_function = False
"""
Adds an opening bracket after a function, because that's normal behaviour.
Removed it again, because in VIM that is not very practical.
"""
no_completion_duplicates = True
"""
If set, completions with the same name don't appear in the output anymore,
but are in the `same_name_completions` attribute.
"""
# ----------------
# Filesystem cache
# ----------------
use_filesystem_cache = True
"""
Use filesystem cache to save once parsed files with pickle.
"""
if platform.system().lower() == 'windows':
_cache_directory = os.path.join(os.getenv('APPDATA') or '~', 'Jedi',
'Jedi')
elif platform.system().lower() == 'darwin':
_cache_directory = os.path.join('~', 'Library', 'Caches', 'Jedi')
else:
_cache_directory = os.path.join(os.getenv('XDG_CACHE_HOME') or '~/.cache',
'jedi')
cache_directory = os.path.expanduser(_cache_directory)
"""
The path where the cache is stored.
On Linux, this defaults to ``~/.cache/jedi/``, on OS X to
``~/Library/Caches/Jedi/`` and on Windows to ``%APPDATA%\\Jedi\\Jedi\\``.
On Linux, if environment variable ``$XDG_CACHE_HOME`` is set,
``$XDG_CACHE_HOME/jedi`` is used instead of the default one.
"""
# ----------------
# parser
# ----------------
fast_parser = True
"""
Use the fast parser. This means that reparsing is only being done if
something has been changed e.g. to a function. If this happens, only the
function is being reparsed.
"""
# ----------------
# dynamic stuff
# ----------------
dynamic_array_additions = True
"""
check for `append`, etc. on arrays: [], {}, () as well as list/set calls.
"""
dynamic_params = True
"""
A dynamic param completion, finds the callees of the function, which define
the params of a function.
"""
dynamic_params_for_other_modules = True
"""
Do the same for other modules.
"""
additional_dynamic_modules = []
"""
Additional modules in which |jedi| checks if statements are to be found. This
is practical for IDEs, that want to administrate their modules themselves.
"""
dynamic_flow_information = True
"""
Check for `isinstance` and other information to infer a type.
"""
auto_import_modules = [
'hashlib', # setattr
]
"""
Modules that are not analyzed but imported, although they contain Python code.
This improves autocompletion for libraries that use ``setattr`` or
``globals()`` modifications a lot.
"""
# ----------------
# caching validity (time)
# ----------------
call_signatures_validity = 3.0
"""
Finding function calls might be slow (0.1-0.5s). This is not acceptible for
normal writing. Therefore cache it for a short time.
"""

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"""
Utilities for end-users.
"""
from __future__ import absolute_import
import __main__
from collections import namedtuple
import logging
import traceback
import re
import os
import sys
from parso import split_lines
from jedi import Interpreter
from jedi.api.helpers import get_on_completion_name
READLINE_DEBUG = False
def setup_readline(namespace_module=__main__):
"""
Install Jedi completer to :mod:`readline`.
This function setups :mod:`readline` to use Jedi in Python interactive
shell. If you want to use a custom ``PYTHONSTARTUP`` file (typically
``$HOME/.pythonrc.py``), you can add this piece of code::
try:
from jedi.utils import setup_readline
setup_readline()
except ImportError:
# Fallback to the stdlib readline completer if it is installed.
# Taken from http://docs.python.org/2/library/rlcompleter.html
print("Jedi is not installed, falling back to readline")
try:
import readline
import rlcompleter
readline.parse_and_bind("tab: complete")
except ImportError:
print("Readline is not installed either. No tab completion is enabled.")
This will fallback to the readline completer if Jedi is not installed.
The readline completer will only complete names in the global namespace,
so for example::
ran<TAB>
will complete to ``range``
with both Jedi and readline, but::
range(10).cou<TAB>
will show complete to ``range(10).count`` only with Jedi.
You'll also need to add ``export PYTHONSTARTUP=$HOME/.pythonrc.py`` to
your shell profile (usually ``.bash_profile`` or ``.profile`` if you use
bash).
"""
if READLINE_DEBUG:
logging.basicConfig(
filename='/tmp/jedi.log',
filemode='a',
level=logging.DEBUG
)
class JediRL(object):
def complete(self, text, state):
"""
This complete stuff is pretty weird, a generator would make
a lot more sense, but probably due to backwards compatibility
this is still the way how it works.
The only important part is stuff in the ``state == 0`` flow,
everything else has been copied from the ``rlcompleter`` std.
library module.
"""
if state == 0:
sys.path.insert(0, os.getcwd())
# Calling python doesn't have a path, so add to sys.path.
try:
logging.debug("Start REPL completion: " + repr(text))
interpreter = Interpreter(text, [namespace_module.__dict__])
lines = split_lines(text)
position = (len(lines), len(lines[-1]))
name = get_on_completion_name(
interpreter._get_module_node(),
lines,
position
)
before = text[:len(text) - len(name)]
completions = interpreter.completions()
except:
logging.error("REPL Completion error:\n" + traceback.format_exc())
raise
finally:
sys.path.pop(0)
self.matches = [before + c.name_with_symbols for c in completions]
try:
return self.matches[state]
except IndexError:
return None
try:
import readline
except ImportError:
print("Jedi: Module readline not available.")
else:
readline.set_completer(JediRL().complete)
readline.parse_and_bind("tab: complete")
# jedi itself does the case matching
readline.parse_and_bind("set completion-ignore-case on")
# because it's easier to hit the tab just once
readline.parse_and_bind("set show-all-if-unmodified")
readline.parse_and_bind("set show-all-if-ambiguous on")
# don't repeat all the things written in the readline all the time
readline.parse_and_bind("set completion-prefix-display-length 2")
# No delimiters, Jedi handles that.
readline.set_completer_delims('')
def version_info():
"""
Returns a namedtuple of Jedi's version, similar to Python's
``sys.version_info``.
"""
Version = namedtuple('Version', 'major, minor, micro')
from jedi import __version__
tupl = re.findall('[a-z]+|\d+', __version__)
return Version(*[x if i == 3 else int(x) for i, x in enumerate(tupl)])

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@ -0,0 +1,10 @@
[pytest]
addopts = --doctest-modules
# Ignore broken files in blackbox test directories
norecursedirs = .* docs completion refactor absolute_import namespace_package scripts extensions speed static_analysis not_in_sys_path buildout_project sample_venvs init_extension_module simple_import
# Activate `clean_jedi_cache` fixture for all tests. This should be
# fine as long as we are using `clean_jedi_cache` as a session scoped
# fixture.
usefixtures = clean_jedi_cache

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#!/usr/bin/env python
"""
Profile a piece of Python code with ``cProfile`` that uses the diff parser.
Usage:
profile.py <file> [-d] [-s <sort>]
profile.py -h | --help
Options:
-h --help Show this screen.
-d --debug Enable Jedi internal debugging.
-s <sort> Sort the profile results, e.g. cumtime, name [default: time].
"""
import cProfile
from docopt import docopt
from jedi.parser.python import load_grammar
from jedi.parser.diff import DiffParser
from jedi.parser.python import ParserWithRecovery
from jedi._compatibility import u
from jedi.common import splitlines
import jedi
def run(parser, lines):
diff_parser = DiffParser(parser)
diff_parser.update(lines)
# Make sure used_names is loaded
parser.module.used_names
def main(args):
if args['--debug']:
jedi.set_debug_function(notices=True)
with open(args['<file>']) as f:
code = f.read()
grammar = load_grammar()
parser = ParserWithRecovery(grammar, u(code))
# Make sure used_names is loaded
parser.module.used_names
code = code + '\na\n' # Add something so the diff parser needs to run.
lines = splitlines(code, keepends=True)
cProfile.runctx('run(parser, lines)', globals(), locals(), sort=args['-s'])
if __name__ == '__main__':
args = docopt(__doc__)
main(args)

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#! /usr/bin/env python
"""
This is a convenience script to test the speed and memory usage of Jedi with
large libraries.
Each library is preloaded by jedi, recording the time and memory consumed by
each operation.
You can provide additional libraries via command line arguments.
Note: This requires the psutil library, available on PyPI.
"""
import time
import sys
import os
import psutil
sys.path.insert(0, os.path.abspath(os.path.dirname(__file__) + '/..'))
import jedi
def used_memory():
"""Return the total MB of System Memory in use."""
return psutil.virtual_memory().used / 2 ** 20
def profile_preload(mod):
"""Preload a module into Jedi, recording time and memory used."""
base = used_memory()
t0 = time.time()
jedi.preload_module(mod)
elapsed = time.time() - t0
used = used_memory() - base
return elapsed, used
def main(mods):
"""Preload the modules, and print the time and memory used."""
t0 = time.time()
baseline = used_memory()
print('Time (s) | Mem (MB) | Package')
print('------------------------------')
for mod in mods:
elapsed, used = profile_preload(mod)
if used > 0:
print('%8.2f | %8d | %s' % (elapsed, used, mod))
print('------------------------------')
elapsed = time.time() - t0
used = used_memory() - baseline
print('%8.2f | %8d | %s' % (elapsed, used, 'Total'))
if __name__ == '__main__':
if sys.argv[1:]:
mods = sys.argv[1:]
else:
mods = ['re', 'numpy', 'scipy', 'scipy.sparse', 'scipy.stats',
'wx', 'decimal', 'PyQt4.QtGui', 'PySide.QtGui', 'Tkinter']
main(mods)

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#!/usr/bin/env python
"""
Profile a piece of Python code with ``cProfile``. Tries a completion on a
certain piece of code.
Usage:
profile.py [<code>] [-n <number>] [-d] [-o] [-s <sort>]
profile.py -h | --help
Options:
-h --help Show this screen.
-n <number> Number of passes before profiling [default: 1].
-d --debug Enable Jedi internal debugging.
-o --omit Omit profiler, just do a normal run.
-s <sort> Sort the profile results, e.g. cum, name [default: time].
"""
import time
import cProfile
from docopt import docopt
import jedi
def run(code, index):
start = time.time()
result = jedi.Script(code).completions()
print('Used %ss for the %sth run.' % (time.time() - start, index + 1))
return result
def main(args):
code = args['<code>']
n = int(args['-n'])
for i in range(n):
run(code, i)
jedi.set_debug_function(notices=args['--debug'])
if args['--omit']:
run(code, n)
else:
cProfile.runctx('run(code, n)', globals(), locals(), sort=args['-s'])
if __name__ == '__main__':
args = docopt(__doc__)
if args['<code>'] is None:
args['<code>'] = 'import numpy; numpy.array([0]).'
main(args)

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#! /usr/bin/env python
"""
Depends: ``objgraph`` (third party Python library)
``wx._core`` is a very nice module to test Jedi's speed and memory performance
on big Python modules. Its size is ~16kLOC (one file). It also seems to look
like a typical big Python modules. A mix between a lot of different Python
things.
You can view a markup version of it here:
http://svn.wxwidgets.org/viewvc/wx/wxPython/trunk/src/gtk/_core.py?view=markup
"""
import resource
import time
import sys
try:
import urllib.request as urllib2
except ImportError:
import urllib2
import gc
from os.path import abspath, dirname
import objgraph
sys.path.insert(0, dirname(dirname(abspath(__file__))))
import jedi
def process_memory():
"""
In kB according to
http://stackoverflow.com/questions/938733/total-memory-used-by-python-process
"""
return resource.getrusage(resource.RUSAGE_SELF).ru_maxrss
uri = 'http://svn.wxwidgets.org/viewvc/wx/wxPython/trunk/src/gtk/_core.py?revision=74740&content-type=text%2Fplain&view=co'
wx_core = urllib2.urlopen(uri).read()
def run():
start = time.time()
print('Process Memory before: %skB' % process_memory())
# After this the module should be cached.
# Need to invent a path so that it's really cached.
jedi.Script(wx_core, path='foobar.py').completions()
gc.collect() # make sure that it's all fair and the gc did its job.
print('Process Memory after: %skB' % process_memory())
print(objgraph.most_common_types(limit=50))
print('\nIt took %s seconds to parse the file.' % (time.time() - start))
print('First pass')
run()
print('\nSecond pass')
run()
print('\nThird pass')
run()

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