python 子类调用父类成员的方法

1.直接写类名调用： parent_class.parent_attribute(self)

 class Animal():

     def __init__(self, name):
         self.name = name

     def say_name(self):
         print(self.name)

 class Dog(Animal):

     def __init__(self, name):
         Animal.__init__(self, name)

     def say_name(self):
         Animal.say_name(self)

 dog = Dog('小虎')
 dog.say_name()   # 打印'小虎'

扩展：实例对象和类对象调用实例函数。

 class Animal():

     def __init__(self, name):
         self.name = name

     def say_name(self):
         print(self.name)

 animal = Animal('nada')
 animal.say_name()         # 实例对象调用实例函数，输出'nada'
 Animal.say_name(animal)   # 类对象调用实例函数，需要传入一个对象实例作为参数，输出'nada'

2.用 super(type, obj).method(arg)方法调用：super(child_class, child_object).parent_attribute(arg)   【不需要写self】

 class Animal(object):

     def __init__(self, name):
         super(Animal, self).__init__()
         self.name = name

     def say_name(self):
         print(self.name)

 class Dog(Animal):

     def __init__(self, name):
         super(Dog, self).__init__(name)

     def say_name(self):
         super(Dog, self).say_name()

 dog = Dog('小虎')
 dog.say_name()    # 输出'小虎'