diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_typing.py | 5 | ||||
| -rw-r--r-- | Lib/typing.py | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py index f13541e..341be1d 100644 --- a/Lib/test/test_typing.py +++ b/Lib/test/test_typing.py @@ -4768,6 +4768,11 @@ class TypeAliasTests(BaseTestCase): with self.assertRaises(TypeError): isinstance(42, TypeAlias) + def test_stringized_usage(self): + class A: + a: "TypeAlias" + self.assertEqual(get_type_hints(A), {'a': TypeAlias}) + def test_no_issubclass(self): with self.assertRaises(TypeError): issubclass(Employee, TypeAlias) diff --git a/Lib/typing.py b/Lib/typing.py index abd5899..7743c7f 100644 --- a/Lib/typing.py +++ b/Lib/typing.py @@ -165,7 +165,7 @@ def _type_check(arg, msg, is_argument=True, module=None, *, allow_special_forms= if (isinstance(arg, _GenericAlias) and arg.__origin__ in invalid_generic_forms): raise TypeError(f"{arg} is not valid as type argument") - if arg in (Any, NoReturn, Final): + if arg in (Any, NoReturn, Final, TypeAlias): return arg if isinstance(arg, _SpecialForm) or arg in (Generic, Protocol): raise TypeError(f"Plain {arg} is not valid as type argument") |
