Python decorator as a staticmethod

Question

I\'m trying to write a python class which uses a decorator function that needs information of the instance state. This is working as intended, but if I explicitly make the d

Answer 1

Solution does exist!

Problem is that Static method that is trying to be used as decorator is in fact staticmethod object and is not callable.

Solution: staticmethod object has method __get__ which takes any argument and returns real method: python documentation Python 3.5 and up:

class StaticMethod(object):
    "Emulate PyStaticMethod_Type() in Objects/funcobject.c"

    def __init__(self, f):
        self.f = f

    def __get__(self, obj, objtype=None):
        return self.f

Min solution I came with is:

class A():
    def __init__(self):
        self.n =  2

    @staticmethod
    def _returnBaseAndResult(func):
        from functools import wraps
        @wraps(func)
        def wrapper(*args, **kwargs):
            self = args[0]
            response = func(*args, **kwargs)
            return self.n, response
        return wrapper

    @_returnBaseAndResult.__get__('this can be anything')
    def square(self):
        return self.n**2

if __name__ == '__main__':
    a = A()
    print(a.square())

Will print (2, 4)