On Fri, Apr 29, 2011 at 2:55 AM, Guido van Rossum <gu...@python.org> wrote: > Raymond strongly believes that containers must be allowed to use the > modified definition, I believe purely for performance reasons. > (Without this rule, a list or tuple could not even cut short being > compared to *itself*.) It seems you are in that camp too.
I'm a fan of the status quo, but not just for performance reasons - there is quite a bit of set theory that breaks once you allow non-reflexive equality*, so it makes sense to me to make it official that containers should ignore any non-reflexivity they come across. *To all the mathematicians in the audience yelling at their screens that the very idea of "non-reflexive equality" is an oxymoron... yes, I know :P Cheers, Nick. P.S. It's hard to explain the slightly odd point of view that seeing standard arithmetic constructed from Peano's Axioms and set theory can give you on discussions like this. It's a seriously different (and strange) way of thinking about the basic arithmetic constructs we normally take for granted, though :) -- Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
