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[3.13] gh-116850: Fix argparse for namespaces with not directly writable dict (GH-124667) (GH-124757)

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It now always uses setattr() instead of setting the dict item to modify
the namespace. This allows to use a class as a namespace.
(cherry picked from commit 95e92ef6c7)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Miss Islington (bot) 2024-10-07 23:27:11 +02:00 • committed by GitHub
parent 597b6211ab
commit 11d4b54b88
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3 changed files with 16 additions and 1 deletions
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12
Lib/test/test_argparse.py
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@ -2365,6 +2365,18 @@ class TestAddSubparsers(TestCase):
(NS(foo=False, bar=0.5, w=7, x='b'), ['-W', '-X', 'Y', 'Z']),
)
def test_parse_known_args_to_class_namespace(self):
class C:
pass
self.assertEqual(
self.parser.parse_known_args('0.5 1 b -w 7 -p'.split(), namespace=C),
(C, ['-p']),
)
self.assertIs(C.foo, False)
self.assertEqual(C.bar, 0.5)
self.assertEqual(C.w, 7)
self.assertEqual(C.x, 'b')
def test_parse_known_args_with_single_dash_option(self):
parser = ErrorRaisingArgumentParser()
parser.add_argument('-k', '--known', action='count', default=0)