Guido van Rossum wrote: > On 5/14/07, Benji York <[EMAIL PROTECTED]> wrote: >> Collin Winter wrote: >>> PEP: 3133 >>> Title: Introducing Roles >> Everything included here is included in zope.interface. See in-line >> comments below for the analogs. > > Could you look at PEP 3119 and do a similar analysis?
Sure. > I expect that > the main thing missing there is that it (currently) has no way to > claim that a particular *object* has a certain behavior. Is "it" in that sentence the ABC PEP or zope.interface? > PEP 3119 currently also doesn't have a > verification step -- but this could easily be added as an (optional) > part of the registration call. I don't care much for verification. People using zope.interface have found that writing good tests is superior to on-demand verification, and I suspect execution time verification is a non-starter because of the overhead (not to mention its actual desirability, or lack thereof). > BTW I think Collin made a mistake when he claimed that the Doglike > role should throw a tantrum just because the actual bark() > implementation has an optional extra argument Agreed. -- Benji York http://benjiyork.com _______________________________________________ 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
