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[3.12] GH-110488: Fix two small issues in pathlib.PurePath.with_name() (GH-110651) (#110678)

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Ensure that `PurePath('foo/a').with_name('.')` raises `ValueError`

Ensure that `PureWindowsPath('foo/a').with_name('a:b')` does not raise
`ValueError`.

(cherry picked from commit b5f7777cb3)
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Barney Gale 2023-10-11 05:30:23 +01:00 • committed by GitHub
parent be381b5df5
commit 9ffef4d797
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3 changed files with 15 additions and 6 deletions
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Lib/pathlib.py
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@ -630,8 +630,7 @@ class PurePath(object):
if not self.name:
raise ValueError("%r has an empty name" % (self,))
f = self._flavour
drv, root, tail = f.splitroot(name)
if drv or root or not tail or f.sep in tail or (f.altsep and f.altsep in tail):
if not name or f.sep in name or (f.altsep and f.altsep in name) or name == '.':
raise ValueError("Invalid name %r" % (name))
return self._from_parsed_parts(self.drive, self.root,
self._tail[:-1] + [name])