Python super()方法原理详解

class Bird:
  def __init__(self):
     self.hungry = True
  def eat(self):
     if self.hungry:
        print 'Ahahahah'
     else:
        print 'No thanks!'

class SongBird(Bird):
   def __init__(self):
     self.sound = 'Squawk'
   def sing(self):
     print self.song()

sb = SongBird()
sb.sing()  # 能正常输出
sb.eat()   # 报错，因为 songgird 中没有 hungry 特性

class SongBird(Bird):
   def __init__(self):
     Bird.__init__(self) #
     self.sound = 'Squawk'
   def sing(self):
     print self.song()

class SongBird(Bird):
   def __init__(self):
     super(SongBird,self).__init__()
     self.sound = 'Squawk'
   def sing(self):
     print self.song()