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gh-138407: avoid useless join operation when calculate the hash vaule for pathlib.Path #138645

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gh-138407: avoid useless join operation when calculate the hash vaule for pathlib.Path #138645

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e1a76da
gh-138407: avoid useless join operation when calculate the hash vaule…
Zheaoli Sep 8, 2025
6f9b72d
add test and news
Zheaoli Sep 8, 2025
eff160a
Fix test
Zheaoli Sep 8, 2025
28bff4e
fix review idea
Zheaoli Sep 25, 2025
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7 changes: 6 additions & 1 deletion Lib/pathlib/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -209,7 +209,12 @@ def __hash__(self):
try:
return self._hash
except AttributeError:
self._hash = hash(self._str_normcase)
if self.parser is posixpath:
self._hash = hash((self.root, tuple(self._tail)))
else:
self._hash = hash((self.drive.lower(),
self.root.lower(),
tuple([part.lower() for part in self._tail])))
return self._hash

def __eq__(self, other):
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2025-09-08-19-04-23.gh-issue-138407.BqNAfi.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Avoid useless join operation when calculate the hash vaule for pathlib.Path.
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