| class MiaoshouSingleton(type): | |
| _instances = {} | |
| def __call__(cls, *args, **kwargs): | |
| if cls not in cls._instances: | |
| cls._instances[cls] = super(MiaoshouSingleton, cls).__call__(*args, **kwargs) | |
| cls._instances[cls].__init__(*args, **kwargs) | |
| return cls._instances[cls] | |