python · miss-islington · Aug 25, 2021 · Aug 25, 2021
@@ -4512,6 +4512,11 @@ def test_annotated_in_other_types(self):
        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):

@@ -1573,7 +1573,7 @@ def __init__(self, origin, metadata):
        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 @@ def __eq__(self, other):
    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.