At 07:29 PM 4/30/2007 -0400, Jim Jewett wrote: >On 4/30/07, Phillip J. Eby <[EMAIL PROTECTED]> wrote: > >>It is currently an open issue to determine the best way to implement >>this rule in Python 3.0. Under Python 2.x, a class' metaclass was >>not chosen until the end of the class body, which means that >>decorators could insert a custom metaclass to do processing of this >>sort. (This is how RuleDispatch, for example, implements the implicit >>class rule.) > >>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. (Actually, I think he -1'd *any* change to 3115 to support this feature.) _______________________________________________ Python-3000 mailing list [email protected] http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
