19.12.21 19:41, Ethan Furman пише:
> On 12/19/21 5:40 AM, Serhiy Storchaka wrote:
>
>> classmethod supersedes staticmethod. It was not clearly known when they
>> were introduced, but now we see that there is very few use cases for
>> staticmethod which cannot be replaced by classmethod (actually only one
>> specific case).
>
> What is the one case?
Setting a Python function as a class attribute without making it a method.
def func(*args, **kwargs): ...
class A:
f = staticmethod(func)
a = A()
a.f(1) # calls func(1), not func(a, 1)
It is used in tests if there are C and Python implementations.
staticmethod(func) could be replaced with
lambda self, /, *args, **kwargs: func(*args, **kwargs)
or
property(lambda self: func)
in these cases.
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