[issue20309] Not all descriptors are callable

Armin Rigo added the comment: Instances of 'staticmethod' or 'classmethod' are not callable. I'm unsure why not, but it's good enough, as you need to go through various unexpected hops in order to try to call one. 'dict.fromkeys' is not a classmethod, as seen by "dict.__dict__['fromkeys']".

[issue20309] Not all descriptors are callable

Changes by Larry Hastings : -- title: Class method descriptors are different between builtin and user classes -> Not all descriptors are callable ___ Python tracker ___