bpo-33009: Fix inspect.signature() for single-parameter partialmethods. (GH-6004)

(cherry picked from commit 8a387219bd)

Co-authored-by: Yury Selivanov <yury@magic.io>
This commit is contained in:
Miss Islington (bot) 2018-03-06 10:23:48 -08:00 committed by GitHub
parent 5a0c3987ab
commit 112f799666
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3 changed files with 13 additions and 1 deletions

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@ -2254,7 +2254,8 @@ def _signature_from_callable(obj, *,
return sig
else:
sig_params = tuple(sig.parameters.values())
assert first_wrapped_param is not sig_params[0]
assert (not sig_params or
first_wrapped_param is not sig_params[0])
new_params = (first_wrapped_param,) + sig_params
return sig.replace(parameters=new_params)