1，调用未绑定的超类构造方法

class Bird:    def __init__(self):        self.hungry = True    def eat(self):        if self.hungry:            print("eee")            self.hungry = False        else:            print("No,thanks!")        # print("eat!")class SongBird(Bird):    def __init__(self):        Bird.__init__(self)        self.sound = "squak"    def sing(self):        print (self.sound)sb = SongBird()sb.eat()

 

2，使用super函数

__metaclass__=type#super函数只在新式类中起作用class Bird:    def __init__(self):        self.hungry = True    def eat(self):        if self.hungry:            print("eee")            self.hungry = False        else:            print("No,thanks!")        # print("eat!")class SongBird(Bird):    def __init__(self):        super(SongBird,self).__init__()        self.sound = "squak"    def sing(self):        print (self.sound)sb = SongBird()sb.eat()

一个类继承多个超类的情况下，只需要使用一次super函数就可以