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Remove walrus to lower needed python version

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This commit is contained in:
I-Al-Istannen 2020-05-08 21:21:33 +02:00
parent bb048c3a6d
commit c9deca19ca
1 changed files with 10 additions and 5 deletions
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15
PFERD/transform.py
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@ -37,7 +37,8 @@ def apply_transform(
result: List[TF] = [] result: List[TF] = []
for transformable in transformables: for transformable in transformables:
if new_path := transform(transformable.path): new_path = transform(transformable.path)
if new_path:
transformable.path = new_path transformable.path = new_path
result.append(transformable) result.append(transformable)
return result return result
@ -49,7 +50,8 @@ keep = lambda path: path
def attempt(*args: Transform) -> Transform: def attempt(*args: Transform) -> Transform:
def inner(path: PurePath) -> Optional[PurePath]: def inner(path: PurePath) -> Optional[PurePath]:
for transform in args: for transform in args:
if result := transform(path): result = transform(path)
if result:
return result return result
return None return None
return inner return inner
@ -61,7 +63,8 @@ def do(*args: Transform) -> Transform:
def inner(path: PurePath) -> Optional[PurePath]: def inner(path: PurePath) -> Optional[PurePath]:
current = path current = path
for transform in args: for transform in args:
if result := transform(current): result = transform(current)
if result:
current = result current = result
else: else:
return None return None
@ -105,7 +108,8 @@ def rename(source: str, target: str) -> Transform:
def re_move(regex: Regex, target: str) -> Transform: def re_move(regex: Regex, target: str) -> Transform:
def inner(path: PurePath) -> Optional[PurePath]: def inner(path: PurePath) -> Optional[PurePath]:
if match := to_pattern(regex).fullmatch(str(path)): match = to_pattern(regex).fullmatch(str(path))
if match:
groups = [match.group(0)] groups = [match.group(0)]
groups.extend(match.groups()) groups.extend(match.groups())
return PurePath(target.format(*groups)) return PurePath(target.format(*groups))
@ -114,7 +118,8 @@ def re_move(regex: Regex, target: str) -> Transform:
def re_rename(regex: Regex, target: str) -> Transform: def re_rename(regex: Regex, target: str) -> Transform:
def inner(path: PurePath) -> Optional[PurePath]: def inner(path: PurePath) -> Optional[PurePath]:
if match := to_pattern(regex).fullmatch(path.name): match = to_pattern(regex).fullmatch(path.name)
if match:
groups = [match.group(0)] groups = [match.group(0)]
groups.extend(match.groups()) groups.extend(match.groups())
return path.with_name(target.format(*groups)) return path.with_name(target.format(*groups))