[3.12] gh-130164: Fix inspect.Signature.bind() handling of positional-only args without defaults (GH-130192) by miss-islington · Pull Request #132259 · python/cpython · GitHub
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[3.12] gh-130164: Fix inspect.Signature.bind() handling of positional-only args without defaults (GH-130192) #132259

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Merged
serhiy-storchaka merged 1 commit into from
Apr 8, 2025
+12 −2
Merged

[3.12] gh-130164: Fix inspect.Signature.bind() handling of positional-only args without defaults (GH-130192) #132259

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3 changes: 3 additions & 0 deletions Lib/inspect.py
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8 changes: 6 additions & 2 deletions Lib/test/test_inspect/test_inspect.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4701,7 +4701,11 @@ class TestSignatureBind(unittest.TestCase):
def call(func, *args, **kwargs):
sig = inspect.signature(func)
ba = sig.bind(*args, **kwargs)
return func(*ba.args, **ba.kwargs)
# Prevent unexpected success of assertRaises(TypeError, ...)
try:
return func(*ba.args, **ba.kwargs)
except TypeError as e:
raise AssertionError from e

def test_signature_bind_empty(self):
def test():
Expand Down Expand Up @@ -4901,7 +4905,7 @@ def test(a_po, b_po, c_po=3, /, foo=42, *, bar=50, **kwargs):
self.assertEqual(self.call(test, 1, 2, c_po=4),
(1, 2, 3, 42, 50, {'c_po': 4}))

with self.assertRaisesRegex(TypeError, "missing 2 required positional arguments"):
with self.assertRaisesRegex(TypeError, "missing a required positional-only argument: 'a_po'"):
self.call(test, a_po=1, b_po=2)

def without_var_kwargs(c_po=3, d_po=4, /):
Expand Down
3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2025-02-16-08-56-48.gh-issue-130164.vvoaU2.rst
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