python知识点总结

2013-4-10

1) python单件

class Singleton(object): _instance = None def __new__(cls, *args, **kwargs): if not cls._instance: cls._instance = super(Singleton, cls).__new__( cls, *args, **kwargs) return cls._instance if __name__ == '__main__': s1=Singleton() s2=Singleton() if(id(s1)==id(s2)): print "Same" else: print "Different"