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[3.13] GH-119113: Raise TypeError from pathlib.PurePath.with_suffix(None) (GH-119124) (#119183)

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Restore behaviour from 3.12 when `path.with_suffix(None)` is called.
(cherry picked from commit 3c28510b98)

Co-authored-by: Barney Gale <barney.gale@gmail.com>
This commit is contained in:
Miss Islington (bot) 2024-05-19 18:27:12 +02:00 • committed by GitHub
parent fdc50bac16
commit 27b61c17a1
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3 changed files with 9 additions and 7 deletions
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10
Lib/pathlib/_abc.py
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@ -225,15 +225,13 @@ class PurePathBase:
string, remove the suffix from the path.
"""
stem = self.stem
if not suffix:
return self.with_name(stem)
elif not stem:
if not stem:
# If the stem is empty, we can't make the suffix non-empty.
raise ValueError(f"{self!r} has an empty name")
elif suffix.startswith('.') and len(suffix) > 1:
return self.with_name(stem + suffix)
else:
elif suffix and not (suffix.startswith('.') and len(suffix) > 1):
raise ValueError(f"Invalid suffix {suffix!r}")
else:
return self.with_name(stem + suffix)
def relative_to(self, other, *, walk_up=False):
"""Return the relative path to another path identified by the passed

4
Lib/test/test_pathlib/test_pathlib_abc.py
View file

@ -999,6 +999,7 @@ class DummyPurePathTest(unittest.TestCase):
self.assertRaises(ValueError, P('c:a/b').with_suffix, 'c\\d')
self.assertRaises(ValueError, P('c:a/b').with_suffix, '.c/d')
self.assertRaises(ValueError, P('c:a/b').with_suffix, '.c\\d')
self.assertRaises(TypeError, P('c:a/b').with_suffix, None)
def test_with_suffix_empty(self):
P = self.cls
@ -1006,7 +1007,7 @@ class DummyPurePathTest(unittest.TestCase):
self.assertRaises(ValueError, P('').with_suffix, '.gz')
self.assertRaises(ValueError, P('/').with_suffix, '.gz')
def test_with_suffix_seps(self):
def test_with_suffix_invalid(self):
P = self.cls
# Invalid suffix.
self.assertRaises(ValueError, P('a/b').with_suffix, 'gz')
@ -1017,6 +1018,7 @@ class DummyPurePathTest(unittest.TestCase):
self.assertRaises(ValueError, P('a/b').with_suffix, '.c/.d')
self.assertRaises(ValueError, P('a/b').with_suffix, './.d')
self.assertRaises(ValueError, P('a/b').with_suffix, '.d/.')
self.assertRaises(TypeError, P('a/b').with_suffix, None)
def test_relative_to_common(self):
P = self.cls

2
Misc/NEWS.d/next/Library/2024-05-17-17-32-12.gh-issue-119113.kEv1Ll.rst Normal file
View file

@ -0,0 +1,2 @@
Fix issue where :meth:`pathlib.PurePath.with_suffix` didn't raise
:exc:`TypeError` when given ``None`` as a suffix.