https://github.com/python/cpython/commit/bad9296fb0424bc480fa0ecfd2d60f73c33358f5
commit: bad9296fb0424bc480fa0ecfd2d60f73c33358f5
branch: main
author: sobolevn <[email protected]>
committer: sobolevn <[email protected]>
date: 2026-05-05T17:58:49+03:00
summary:
gh-149410: Test that `typing.NoDefault` is final (#149411)
files:
M Lib/test/test_typing.py
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 5d19e3706802dd..ad644bb3128809 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -11131,6 +11131,10 @@ def test_no_attributes(self):
with self.assertRaises(AttributeError):
type(NoDefault).foo
+ def test_no_subclassing(self):
+ with self.assertRaises(TypeError):
+ class Test(type(NoDefault)): ...
+
class AllTests(BaseTestCase):
"""Tests for __all__."""
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