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'