Andrew Koenig wrote: > To my way of thinking, callable, iterable, and hashable are the same kind of > concept,
But you've just pointed out that they're *not* the same kind of concept, no matter how much you might wish that there were. The only way to make hashability testable at less cost than attempting to do it would be to have a separate __is_hashable__ method for that purpose, which would recursively test contents when necessary. I'm far from convinced that testing for hashability is necessary enough to be worth going to that much bother. To my mind it's another case where you shouldn't be designing APIs based on that. -- Greg _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
