You can define Singleton class manually, but if you want to create multiple different Singleton classes on the fly then you can use the function below :
#Factory : to create Singleton classes def singleton(new_klass, klass): def new(cls, *args, **kvargs): if not hasattr(cls, 'instance'): cls.instance = klass(*args, **kvargs) return cls.instance globals()[new_klass] = type(new_klass, (object,), {'__new__' : new})
