diff options
| -rw-r--r-- | Lib/test/test_typing.py | 5 | ||||
| -rw-r--r-- | Lib/typing.py | 7 |
2 files changed, 11 insertions, 1 deletions
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py index b1cd547..7b2fd69 100644 --- a/Lib/test/test_typing.py +++ b/Lib/test/test_typing.py @@ -4512,6 +4512,11 @@ 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): diff --git a/Lib/typing.py b/Lib/typing.py index 4935460..423329a 100644 --- a/Lib/typing.py +++ b/Lib/typing.py @@ -1573,7 +1573,7 @@ class _AnnotatedAlias(_GenericAlias, _root=True): if isinstance(origin, _AnnotatedAlias): metadata = origin.__metadata__ + metadata origin = origin.__origin__ - super().__init__(origin, origin, name="Annotated") + super().__init__(origin, origin) self.__metadata__ = metadata def copy_with(self, params): @@ -1601,6 +1601,11 @@ class _AnnotatedAlias(_GenericAlias, _root=True): def __hash__(self): return hash((self.__origin__, self.__metadata__)) + def __getattr__(self, attr): + if attr in {'__name__', '__qualname__'}: + return 'Annotated' + return super().__getattr__(attr) + class Annotated: """Add context specific metadata to a type. |