[Python-Dev] python 3.0, tp_compare not used for == test? (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Mon Feb 2 11:36:29 CET 2009

Terry Reedy wrote:

Campbell Barton wrote: In 3.0, the build-in cmp() should have been removed and will be for 3.0.1. Do not use it. I believe the tpcompare slot should not be used either. It will become reserved. It will not be removed only because that would change the binary layout.

I'm wondering if Mark should add the exception he recently removed back in as a Deprecation Warning when tp_compare is defined, but tp_richcompare is not. Such a warning should also be present when running with -3 in 2.7 (assuming it isn't already there).

Otherwise we're going to get more questions like Campbell's wondering if it is intentional that tp_compare is no longer getting called in the 3.x series (the warnings would both make it explicit and give guidance on what to do about it).

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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