调用父母的父方法，该方法已由父母重写 [英] Calling a parent's parent's method, which has been overridden by the parent

问题描述

如果在继承链中被另一个类覆盖，如何在继承链上调用多个类的方法？

How do you call a method more than one class up the inheritance chain if it's been overridden by another class along the way?

class Grandfather(object):
    def __init__(self):
        pass

    def do_thing(self):
        # stuff

class Father(Grandfather):
    def __init__(self):
        super(Father, self).__init__()

    def do_thing(self):
        # stuff different than Grandfather stuff

class Son(Father):
    def __init__(self):
        super(Son, self).__init__()

    def do_thing(self):
        # how to be like Grandfather?

推荐答案

如果你总是想要祖父#do_thing ，无论祖父是父的直接超类，那么你可以明确在 Son self 对象上调用祖父#do_thing ：

If you always want Grandfather#do_thing, regardless of whether Grandfather is Father's immediate superclass then you can explicitly invoke Grandfather#do_thing on the Son self object:

class Son(Father):
    # ... snip ...
    def do_thing(self):
        Grandfather.do_thing(self)

另一方面，如果你想调用父的超类的 do_thing 方法，无论是祖父你应该使用 super （如在Thierry的回答中）：

On the other hand, if you want to invoke the do_thing method of Father's superclass, regardless of whether it is Grandfather you should use super (as in Thierry's answer):

class Son(Father):
    # ... snip ...
    def do_thing(self):
        super(Father, self).do_thing()

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