20.06.18 19:37, Guido van Rossum пише:
On Wed, Jun 20, 2018 at 9:31 AM Serhiy Storchaka <storch...@gmail.com <mailto:storch...@gmail.com>> wrote:

    20.06.18 19:20, Guido van Rossum пише:
     > +1 -- when we introduced these we didn't see the use case so
    clearly,
     > but it definitely exists.

    How would you call a classmethod descriptor in this case?


With an extra first argument that's a class -- it should just call the wrapped function with whatever args are presented to the descriptior.

This differs from calling a class method outside of the class definition body. And in the class definition body the class is not defined still.

class Spam:
    @classmethod
    def utility(arg):
        ...

    value = utility(???, arg)

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