A simple illustration of the Singleton pattern in Python

Singleton.py

class Singleton:
        the_actual_instance = None

        class _Singleton:
                """
                  The actual implementation of the Singleton class should reside here
                """
                def __init__(self):
                        self.name = 'mayor'
                        print('this should only be printed once.. i.e this class should only be instantiated once.')

                def create_room(self, room_name):
                        print 'I see you are trying to create a new room ', room_name

        def __init__(self):
                if not Singleton.the_actual_instance:
                        print('Fresh start')
                        Singleton.the_actual_instance = Singleton._Singleton()
                        print Singleton.the_actual_instance, '.....'
                else:
                        pass

        def __getattr__(self, required_attribute):
                return getattr(self.the_actual_instance, required_attribute)