1Q84

摘要： 1 class Test(object): 2 def __init__(self): 3 super(Test, self).__init__() 4 self.stopped = False 5 6 @classmethod 7 def instance(): 8 if not hasattr(Test, "_instance"): 9 Test._instance = Test() 10 return Test._instance 11 ... 阅读全文