[issue1691070] Speed up PyArg_ParseTupleAndKeywords() and improve error msg

[Christian Heimes]

Christian Heimes added the comment:

Can you review the patch and commit it for 2.6? A patch which cleans up
the code *and* make it faster is always a good idea. :)

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assignee:  -> nnorwitz
nosy: +tiran
versions: +Python 2.6

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1691070>
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