[Python-Dev] slightly inconsistent set/list pop behaviour (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Wed Apr 8 11:42:49 CEST 2009

Mark Dickinson <dickinsm gmail.com> writes:

On Wed, Apr 8, 2009 at 7:13 AM, John Barham <jbarham gmail.com> wrote: > If you play around a bit it becomes clear that what set.pop() returns > is independent of the insertion order: It might look like that, but I don't think this is true in general (at least, with the current implementation):

Not to mention that other implementations (Jython, etc.) will probably exhibit yet different behaviour, and the CPython hash functions are not engraved in stone either. If you want to write portable code, you can't rely on any reproduceable ordering for random set member access.

Regards

Antoine.

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