python 面向对象__call__

[oracle@node01 0914]$ cat a1.py class Person(object):    def __init__(self, name, gender):        self.name = name        self.gender = gender    def query(self,friend):        print self.name        print self.gender        self.friend=friend        print self.friend h=Person('aa','bb')h.query('cc')[oracle@node01 0914]$ python a1.py aabbcc[oracle@node01 0914]$ [oracle@node01 0914]$ cat a2.py class Person(object):    def __init__(self, name, gender):        self.name = name        self.gender = gender    def __call__(self,friend):        print self.name        print self.gender        self.friend=friend        print self.friendp=Person('Bob', 'male')p('Tim')[oracle@node01 0914]$ python a2.py BobmaleTim一个类实例也可以变成一个可调用对象，只需要实现一个特殊方法__call__()。