Hi, I just hunted down a change in behaviour between Python 3.1 and 3.2 to possibly changed iteration order of sets due to the optimization in issue #8685. Of course, this order shouldn't be relied on in the first place, but the side effect of the optimization might be worth mentioning in "What's new", maybe also pointing out that the old behaviour can be simulated with {x for x in a if x not in b} in place of "a-b".
Cheers, Hagen _______________________________________________ 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