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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def authenticators(self, auths):
 """ A decorator that sets a list of authenticators for a function. :param auths: The list of authenticator instances or classes. :return: A function """


        if not isinstance(auths, (list, tuple)):
            auths = [auths]

        instances = []

        for auth in auths:
            if isclass(auth):
                instances.append(auth())
            else:
                instances.append(auth)

        def decorator(func):
            func.authenticators = instances
            return func
        return decorator