Why not defining new methods/changing the behaviour using a different
metaclass?
Victor
Le 27 avr. 2013 05:12, "Nikolaus Rath" <Nikolaus at rath.org> a écrit :
> Steven D'Aprano <steve at 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.«
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