pferd/PFERD/utils.py
2021-05-16 14:32:53 +02:00

59 lines
1.5 KiB
Python

import asyncio
import contextvars
import functools
import getpass
from typing import Any, Callable, Optional, TypeVar
import bs4
T = TypeVar("T")
# TODO When switching to 3.9, use asyncio.to_thread instead of this
async def to_thread(func: Callable[..., T], *args: Any, **kwargs: Any) -> T:
# https://github.com/python/cpython/blob/8d47f92d46a92a5931b8f3dcb4a484df672fc4de/Lib/asyncio/threads.py
loop = asyncio.get_event_loop()
ctx = contextvars.copy_context()
func_call = functools.partial(ctx.run, func, *args, **kwargs)
return await loop.run_in_executor(None, func_call) # type: ignore
async def ainput(prompt: str) -> str:
return await to_thread(lambda: input(prompt))
async def agetpass(prompt: str) -> str:
return await to_thread(lambda: getpass.getpass(prompt))
def soupify(data: bytes) -> bs4.BeautifulSoup:
"""
Parses HTML to a beautifulsoup object.
"""
return bs4.BeautifulSoup(data, "html.parser")
async def prompt_yes_no(query: str, default: Optional[bool]) -> bool:
"""
Asks the user a yes/no question and returns their choice.
"""
if default is True:
query += " [Y/n] "
elif default is False:
query += " [y/N] "
else:
query += " [y/n] "
while True:
response = (await ainput(query)).strip().lower()
if response == "y":
return True
elif response == "n":
return False
elif response == "" and default is not None:
return default
print("Please answer with 'y' or 'n'.")