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GH-111429: Speed up `pathlib.PurePath.[is_]relative_to()` (#111431)

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Barney Gale 2023-11-12 22:59:17 +00:00 committed by GitHub
parent b2af50cb02
commit d7cef7bc7e
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2 changed files with 10 additions and 4 deletions
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12
Lib/pathlib.py
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@ -647,9 +647,11 @@ class PurePath:
"scheduled for removal in Python {remove}")
warnings._deprecated("pathlib.PurePath.relative_to(*args)", msg,
remove=(3, 14))
other = self.with_segments(other, *_deprecated)
other = self.with_segments(other, *_deprecated)
elif not isinstance(other, PurePath):
other = self.with_segments(other)
for step, path in enumerate([other] + list(other.parents)):
if self.is_relative_to(path):
if path == self or path in self.parents:
break
elif not walk_up:
raise ValueError(f"{str(self)!r} is not in the subpath of {str(other)!r}")
@ -658,7 +660,7 @@ class PurePath:
else:
raise ValueError(f"{str(self)!r} and {str(other)!r} have different anchors")
parts = ['..'] * step + self._tail[len(path._tail):]
return self.with_segments(*parts)
return self._from_parsed_parts('', '', parts)
def is_relative_to(self, other, /, *_deprecated):
"""Return True if the path is relative to another path or False.
@ -669,7 +671,9 @@ class PurePath:
"scheduled for removal in Python {remove}")
warnings._deprecated("pathlib.PurePath.is_relative_to(*args)",
msg, remove=(3, 14))
other = self.with_segments(other, *_deprecated)
other = self.with_segments(other, *_deprecated)
elif not isinstance(other, PurePath):
other = self.with_segments(other)
return other == self or other in self.parents
@property

2
Misc/NEWS.d/next/Library/2023-10-28-22-11-11.gh-issue-111429.mJGxuQ.rst Normal file
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@ -0,0 +1,2 @@
Speed up :meth:`pathlib.PurePath.relative_to` and
:meth:`~pathlib.PurePath.is_relative_to`.