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bpo-44524: Don't modify MRO when inheriting from typing.Annotated (GH-27841)

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Ken Jin 2021-08-26 02:13:59 +08:00 • committed by GitHub
parent 551da597a0
commit 23384a1749
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2 changed files with 11 additions and 1 deletions
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5
Lib/test/test_typing.py
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@ -4568,6 +4568,11 @@ class AnnotatedTests(BaseTestCase):
X = List[Annotated[T, 5]]
self.assertEqual(X[int], List[Annotated[int, 5]])
def test_annotated_mro(self):
class X(Annotated[int, (1, 10)]): ...
self.assertEqual(X.__mro__, (X, int, object),
"Annotated should be transparent.")
class TypeAliasTests(BaseTestCase):
def test_canonical_usage_with_variable_annotation(self):