On 4/30/07, Phillip J. Eby <[EMAIL PROTECTED]> wrote:
> At 07:29 PM 4/30/2007 -0400, Jim Jewett wrote:
> >On 4/30/07, Phillip J. Eby <[EMAIL PROTECTED]> wrote:
> >>PEP 3115, however, requires that a class' metaclass be determined
> >>*before* the class body has executed, making it impossible to use this
> >>technique for class decoration any more.
> >It doesn't say what that metaclass has to do, though.
> >Is there any reason the metaclass couldn't delegate differently
> >depending on the value of __my_magic_attribute__ ?
> Sure -- that's what I suggested in the "super(), class decorators, and PEP
> 3115" thread, but Guido voted -1 on adding such a magic attribute to PEP
> 3115.
I don't think we're understanding each other. Why couldn't you use a
suitably fleshed-out version of:
class _ConditionalMetaclass(type):
def __init__(cls, name, bases, dct):
super(_ConditionalMetaclass, cls).__init__(name, bases, dct)
hooks = [(k, v) for (k, v) in dct.items() if
k.startswith("_afterhook_")]
for k, v in hooks:
cls = AfterHooksRegistry[k](cls, v)
-jJ
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