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        如何扩展 Python 类初始化

        How to extend Python class init(如何扩展 Python 类初始化)
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                • 本文介绍了如何扩展 Python 类初始化的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我已经创建了一个基类:

                  I have created a base class:

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

                  我想扩展类并添加到 init 方法中,以便 SubThing 同时具有 nametime 属性.我该怎么做?

                  I want to extend the class and add to the init method so the that SubThing has both a name and a time property. How do I do it?

                  class SubThing(Thing):
                      # something here to extend the init and add a "time" property
                  
                      def __repr__(self):
                          return '<%s %s>' % (self.name, self.time)
                  

                  任何帮助都会很棒.

                  推荐答案

                  可以在子类中定义__init__,调用super来调用父类的__init__ 适当的方法:

                  You can just define __init__ in the subclass and call super to call the parents' __init__ methods appropriately:

                  class SubThing(Thing):
                      def __init__(self, *args, **kwargs):
                          super(SubThing, self).__init__(*args, **kwargs)
                          self.time = datetime.now()
                  

                  确保你的基类是 object 的子类,因为 super 不适用于旧式类:

                  Make sure to have your base class subclass from object though, as super won't work with old-style classes:

                  class Thing(object):
                      ...
                  

                  这篇关于如何扩展 Python 类初始化的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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