def setname(name):
    def wrapper(cls):
        cls.NAME = name
        return cls
    return  wrapper

@setname('MY CLASS')
class MyClass:
    pass

print(MyClass.__dict__)

class MyClass:

    xxx = "XXX"

    def foo(self):
        print("foo")

    @classmethod
    def clsmd(cls):
        print("{}.xxx={}".format(cls.__name__,cls.xxx))



a =MyClass()
a.foo()

MyClass.clsmd()
a.clsmd()