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-rw-r--r--Lib/test/test_typing.py5
-rw-r--r--Lib/typing.py2
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")