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I just want to make sure I understand the semantics concerning class methods, the following example demonstrates a usage similar to regular methods as much as possible:
class A(object):
 def add(self, x, y):
 print(self)
 return x + y
 add10 = partialmethod(add, 10)
 add10class = classmethod(partialmethod(add, 10))
assert A().add10(5) == 15 # prints <__main__.A object at 0x1097e1390>
assert A.add10class(5) == 15 # prints <class '__main__.A'>
Another option would be to return a class-bound partial from the __get__ method. It's not as consistent as the first example but perhaps nicer:
class A(object):
 def add(self, x, y):
 print(self)
 return x + y
 add10 = partialmethod(add, 10)
assert A().add10(5) == 15 # prints <__main__.A object at 0x1097e1390>
assert A.add10(5) == 15 # prints <class '__main__.A'>
Is the first option what you had in mind?