[issue31229] wrong error messages when too many kwargs are received

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

In all of these cases PyArg_ParseTupleAndKeywords() is used in uncommon way. These functions accept variable number of positional-only arguments, and PyArg_ParseTupleAndKeywords() is called with empty args tuple for parsing keyword arguments only. The patch uses a trick for detecting this case and generating more appropriate error message. Correct error message is generated in a normal case too.

LGTM. But it may be worth to add a short comment about the necessary of this special case. And please add tests for error messages in all of these functions. test_call looks appropriate place for them.

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nosy: +haypo, serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue31229>
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