On 1/29/08, Mike Klaas <[EMAIL PROTECTED]> wrote: > On 29-Jan-08, at 2:29 PM, Greg Ewing wrote:
> > Jim Jewett wrote: > >> The majority of uses need a mutable set that starts empty. > > Does anyone have evidence to support that assertion? > $ pygrep '[^.a-z]set[(]' | grep -v unittest | wc > 320 1583 24774 > Empty set(): > $ pygrep '[^.a-z]set[(][)]' | grep -v unittest | wc > 114 478 7406 > Some of the uses in the first group could be replaced with frozenset, > of course. Looking at the examples, though, I would say that most of > the uses of sets start out using a set constructed using > comprehension or set(<iterable>). Apparently you abstract your code better than I do. Many of my mutable sets could be done that way if the iterable were described better; in practice, I just create the set as empty and add to it. How often is that iterable a literal? (For me, almost always, because otherwise I usually either don't make the iterable explicit, or don't bother turning it into a set.) How often do you change the set again after the initial iterable is exhausted? (I don't, but I suspect that might be a style quirk.) -jJ _______________________________________________ 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
