完整的单例模式

import timeimport threadingclass Singsing:    lock = threading.Lock()    instance = None    def __init__(self, name):        self.name = name    def __new__(cls, *args, **kwargs):        if cls.instance:            return cls.instance        with cls.lock:            if cls.instance:                return cls.instance            time.sleep(0.1)            cls.instance = object.__new__(cls)            return cls.instancedef task():    singer = Singsing('name')    print(singer)for i in range(10):    t = threading.Thread(target=task)    t.start()

来源：https://www.cnblogs.com/xuyuwei/p/11545043.html