Add to non-generic TypedDict

Author: adriangb

Lib/test/test_typing.py

@@ -7125,6 +7125,9 @@ class TD(TypedDict):
         a = A(a = 1)
         self.assertIs(type(a), dict)
         self.assertEqual(a, {'a': 1})
+    
+    def test_orig_bases(self):
+        self.assertEqual(ChildTotalMovie.__orig_bases__, (ParentNontotalMovie,))
 
 
 class RequiredTests(BaseTestCase):

Lib/typing.py

@@ -2994,6 +2994,9 @@ def __new__(cls, name, bases, ns, total=True):
 
         tp_dict = type.__new__(_TypedDictMeta, name, (*generic_base, dict), ns)
 
+        if not hasattr(tp_dict, '__orig_bases__'):
+            tp_dict.__orig_bases__ = bases
+
         annotations = {}
         own_annotations = ns.get('__annotations__', {})
         msg = "TypedDict('Name', {f0: t0, f1: t1, ...}); each t must be a type"