Daniel Stutzbach wrote: > On Tue, Feb 10, 2009 at 11:16 AM, Steve Holden <st...@holdenweb.com > <mailto:st...@holdenweb.com>> wrote: > > That's true, but the same *could* be said about the existing > optimizations for objects that define their own __contains__. > > > No, because there isn't a __not_contains__, so you cannot define the > inverse operation differently. "not a in b" and "a not in b" have > exactly the same effects. > Ah, right, that guarantees semantic equivalence. Sorry.
regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ _______________________________________________ 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
