Python：如何将所有属性从基类复制到派生类 [英] Python: How to copy all attibutes from base class to derived one

问题描述

我想实现以下：

#!/usr/bin/python
class SuperHero(object): 
    def setName(self, name):
        self.name = name
    def getName(self):
        return self.name

class SuperMan(SuperHero): 
    pass

if __name__ == "__main__":
    sh = SuperHero()
    sh.setName("Clark Kent")
    sm = SuperMan(sh)  # This does *not* work in real python
    print sm.getName() # prints "Clark Kent"

我必须逐一复制属性，还是有更好的方法？

Do I have to copy the attributes one by one or is there a better way to do it?

推荐答案

我更喜欢显式的解决方案 - 复制一个。 Martijn Pieters 的解决方案很不错，但随着时间的推移，你的 __ dict __ 可能会增长，你可能不想复制它的所有内容（或更糟 - 忘记这个事实，并体验一些讨厌的副作用）。除了Python的Zen说： Explicit比隐式更好。。

I'd prefer explicit solution - copying one by one. Martijn Pieters's solution is nice, but with time your __dict__ may grow and you may not want to copy all it's content (or worse - forget about this fact and experience some nasty side effects). Besides the Zen of Python says: Explicit is better than implicit..

， 对？所以你的代码可能更pythonic如果你使用他们：

Side note - you are aware of properties, right? So your code could be more pythonic if you used them:

class SuperHero(object):
    @property
    def name(self):
        return self._name
    @name.setter
    def name(self, name):
        self._name = name

sh = SuperHero()
sh.name = "Clark Kent" 

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