设计模式(六):单件模式
有时候你需要系统只产生一个类的实例,比如你的手机上面所有的应用,只能共享同一份电话薄。
python的代码很简单:
http://blog.csdn.net/insistgogo/article/details/9412863
def Singleton( cls ): instance = {} def GetInstance(): if cls not in instance: instance[cls] = cls() return instance[cls] return GetInstance @Singleton class SingletonCls(object): """docstring for SingletonCls""" def __init__(self ): self.name = 'This is singleton.' def GetName( self ): return self.name if __name__ == '__main__': phoneNumber = SingletonCls() print phoneNumber.GetName() phoneNumber1 = SingletonCls() if phoneNumber1 == phoneNumber: print "The same instance." else: print "Not the same."