how to make class and instance method (multiple decorator) ?

[micseydel]

If you really want this for some reason, you could do something like this

class Foo():
    def __init__(self):
        self.method = self.__instance_method
    
    @classmethod
    def method(cls):
        print("method class =", cls)

    def __instance_method(self):
        print("method object =", self)
 
Foo.method()

foo = Foo()
foo.method()

Output:
method class = <class '__main__.Foo'>
method object = <__main__.Foo object at 0x7f76cb5409e8>

But again, making their behavior identical doesn't really make sense.