python中的__call__

class TmpTest:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def __call__(self, x, y):
        self.x, self.y = x, y


a = TmpTest(1, 2)
a(4, 5)
print(a.x, a.y)
4 5

class TmpTest:
    def __init__(self, func):
        self.func=func

    def __call__(self, *args,**kwargs):
        result=self.func(*args,**kwargs)
        return result


@TmpTest
def add_num(x,y):
    return x+y

print(add_num(1,0))
1