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[3.14] gh-141174: Test get_annotations() on wrapped cyclical functools.partial (GH-155663) #155710

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Merged
JelleZijlstra merged 1 commit into from
Aug 13, 2026
+7 −0
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[3.14] gh-141174: Test get_annotations() on wrapped cyclical functools.partial (GH-155663) #155710

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7 changes: 7 additions & 0 deletions Lib/test/test_annotationlib.py
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Original file line number Diff line number Diff line change
Expand Up @@ -654,6 +654,13 @@ def f(x: 'int') -> 'str': ...
result = get_annotations(f, eval_str=True)
self.assertEqual(result, {'x': int, 'return': str})

def test_eval_str_wrapped_partial_cycle_self(self):
def f(x: 'int') -> 'str': ...
f.__wrapped__ = functools.partial(f, 0)
# Cycle is detected and broken; globals from f itself are used.
result = get_annotations(f, eval_str=True)
self.assertEqual(result, {'x': int, 'return': str})

def test_eval_str_wrapped_cycle_mutual(self):
# gh-146556: mutual __wrapped__ cycle (a -> b -> a) must not hang.
def a(x: 'int'): ...
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