bpo-41810: Reintroduce `types.EllipsisType`, `.NoneType` & `.NotImplementedType` (GH-22336)

closes issue 41810

2 files changed, 13 insertions, 0 deletions

diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
index f499fb9..52a59d5 100644
--- a/Lib/test/test_types.py
+++ b/Lib/test/test_types.py
@@ -713,6 +713,16 @@ class TypesTests(unittest.TestCase):
         assert repr(int | None) == "int | None"
         assert repr(int | typing.GenericAlias(list, int)) == "int | list[int]"
 
+    def test_ellipsis_type(self):
+        self.assertIsInstance(Ellipsis, types.EllipsisType)
+
+    def test_notimplemented_type(self):
+        self.assertIsInstance(NotImplemented, types.NotImplementedType)
+
+    def test_none_type(self):
+        self.assertIsInstance(None, types.NoneType)
+
+
 class MappingProxyTests(unittest.TestCase):
     mappingproxy = types.MappingProxyType
 
diff --git a/Lib/types.py b/Lib/types.py
index 9642e72..532f480 100644
--- a/Lib/types.py
+++ b/Lib/types.py
@@ -296,5 +296,8 @@ def coroutine(func):
 GenericAlias = type(list[int])
 Union = type(int | str)
 
+EllipsisType = type(Ellipsis)
+NoneType = type(None)
+NotImplementedType = type(NotImplemented)
 
 __all__ = [n for n in globals() if n[:1] != '_']