Why not defining new methods/changing the behaviour using a different metaclass?
Victor Le 27 avr. 2013 05:12, "Nikolaus Rath" <nikol...@rath.org> a écrit : > Steven D'Aprano <st...@pearwood.info> writes: > > On 26/04/13 13:22, Greg wrote: > >> On 26/04/2013 3:12 p.m., Glenn Linderman wrote: > >>> On 4/25/2013 7:49 PM, Nick Coghlan wrote: > >> > >>>> You couldn't create an enum of callables, but that would be a > >>>> seriously weird thing to do anyway.... > >>> > >>> But aren't all classes callable? > >> > >> An enum of classes would be seriously weird as well, I think. > > > > > > I don't think iscallable will work, since that descriptors like > > staticmethod and classmethod aren't callable. Nor are properties. > > > > > > I think a solution may be an explicit decorator that tells the > > metaclass not to skip the object into an enum value: > > > > > > class Insect(enum.Enum): > > ant = 1 > > bee = 2 > > > > @enum.skip > > @classmethod > > def spam(cls, args): > > pass > > > In this case, wouldn't it be nicer to "decorate" those attributes that > are meant to be enum values? I think having to use the class keyword to > define something that really doesn't behave like an ordinary class is > pretty confusing, and the following syntax would be a lot easier to > understand at first sight: > > class Insect(enum.Enum): > ant = enum.EnumValue(1) > bee = enum.EnumValue(2) > > @classmethod > def spam(cls, args): > pass > > def ham(self, args): > pass > > > Obviously, EnumValue() would automatically assign a suitable number. > > > Best, > > -Nikolaus > > -- > »Time flies like an arrow, fruit flies like a Banana.« > > PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C > > _______________________________________________ > 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/victor.stinner%40gmail.com >
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