Fix annotationlib.

Author: serhiy-storchaka

Lib/annotationlib.py

@@ -284,10 +284,12 @@ def __hash__(self):
         ))
 
     def __or__(self, other):
-        return types.UnionType[self, other]
+        import typing
+        return typing.Union[self, other]
 
     def __ror__(self, other):
-        return types.UnionType[other, self]
+        import typing
+        return typing.Union[other, self]
 
     def __repr__(self):
         extra = []

Lib/test/test_annotationlib.py

@@ -137,7 +137,8 @@ class UnionForwardrefs:
             str | int,
         )
         union = annos["union"]
-        self.assertIsInstance(union, Union)
+        self.assertIs(typing.get_origin(union), Union)
+        # self.assertIsInstance(union, Union)
         arg1, arg2 = typing.get_args(union)
         self.assertIs(arg1, str)
         self.assertEqual(