Decorator of an inner function

Hi, I’m creating a simple program in python using socket and threading module. I have created inside a class a subclass containing all the decorators (I saw this technique at this link) as follows:

class Server(object):

    class Decorators(object):
    
        @classmethod
        def make_threaded(cls, function):
            def inner(*args):
                function_thread = threading.Thread(target=function, args=args)
                function_thread .start()
               return function_thread 
            return inner

        @Decorators.make_threaded
        def simple_function(self):

            def inner1():
                pass

            def inner2():
                pass

Therefore, I would like to decorate the inner1 and inner2 functions as well using the same decorator. But, when I try to to rewrite the function as:

@Decorators.make_threaded
def simple_function(self):

    @Decorators.make_threaded
    def inner1():
        pass

    @Decorators.make_threaded
    def inner2():
        pass

I get an error: NameError: name ‘Decorators’ is not defined. How can I avoid this error and implement the decorator in the inner1,2 functions as well?

Thank you very much for your time and excuse my english, I’m still practising it!