usr/lib/python3.6/site-packages/tuned/patterns.py000064400000000517147205135770015762 0ustar00class Singleton(object): """ Singleton design pattern. """ _instance = None def __init__(self): if self.__class__ is Singleton: raise TypeError("Cannot instantiate directly.") @classmethod def get_instance(cls): """Get the class instance.""" if cls._instance is None: cls._instance = cls() return cls._instance