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Sun Aug 13 08:31:06 CEST 2006 · https://mail.python.org/pipermail/python-dev/2006-August/068214.html

Travis E. Oliphant wrote:
> Internally PyNumber_AsSize_t makes a call to PyNumber_Index, and 
> PyNumber_Index also calls the PyIndex_Check as well .  So, basically we 
> end up calling PyIndex_Check(obj) 2 times when only one check should be 
> necessary.
> 
> This code could be re-written to move any other type checks first and 
> replace the PyIndex_Check(obj) code with PyNumber_Index(obj) and error 
> handling but I'm not sure if that's the right way to go or if it's worth 
> it.

This concern was what lead me up the garden path with the more complicated C 
API in my patch. I've since become convinced that compared to everything else 
going on, the repetition of the 3 not-NULL checks performed by that macro 
really isn't worth worrying about (particularly at this stage of the release 
cycle).

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://www.boredomandlaziness.org

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Showing content from https://mail.python.org/pipermail/python-dev/2006-August/068214.html below:

[Python-Dev] Fwd: [Python-checkins] r51236 - in python/trunk: Doc/api/abstract.tex Include/abstract.h Include/object.h Lib/test/test_index.py Misc/NEWS Modules/arraymodule.c Modules/mmapmodule.c Modules/operator.c Objects/abstract.c Objects/classobject.c Objects/