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  1. class instanceable_classmethod(classmethod):
  2.     def __init__(self, func):
  3.         super().__init__(func)
  4.         self.instance_func = self.__func__
  5.  
  6.     def instancemethod(self, func):
  7.         self.instance_func = func
  8.         return self
  9.  
  10.     def __get__(self, obj, cls=None):
  11.         if obj is None:
  12.             return super().__get__(obj, cls)
  13.         return self.instance_func.__get__(obj)
  14.  
  15.  
  16. class Foo(object):
  17.     def __init__(self, text):
  18.         self.text = text
  19.  
  20.     @instanceable_classmethod
  21.     def bar(cls):
  22.         return None
  23.  
  24.     @bar.instancemethod
  25.     def bar(self):
  26.         return self.text
  27.  
  28. print(Foo.bar())  # outputs None
  29. foo = Foo('foo')
  30. print(foo.bar())  # outputs foo
Success #stdin #stdout 0.11s 14152KB
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Standard input is empty
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None
foo
https://ideone.com/PmSnUC
language:
Python 3 (python  3.12)
created:
54 days ago
visibility:
secret

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