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gh-112405: Optimise pathlib.Path.relative_to
(#112406)
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@ -14,6 +14,7 @@
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import warnings
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from _collections_abc import Sequence
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from errno import ENOENT, ENOTDIR, EBADF, ELOOP, EINVAL
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from itertools import chain
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from stat import S_ISDIR, S_ISLNK, S_ISREG, S_ISSOCK, S_ISBLK, S_ISCHR, S_ISFIFO
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try:
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@ -445,7 +446,7 @@ def relative_to(self, other, /, *_deprecated, walk_up=False):
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other = self.with_segments(other, *_deprecated)
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elif not isinstance(other, PurePath):
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other = self.with_segments(other)
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for step, path in enumerate([other] + list(other.parents)):
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for step, path in enumerate(chain([other], other.parents)):
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if path == self or path in self.parents:
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break
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elif not walk_up:
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@ -0,0 +1 @@
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Optimize :meth:`pathlib.PurePath.relative_to`. Patch by Alex Waygood.
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