Python扩展方法

本文介绍了Python扩展方法的处理方法，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小编来一起学习吧！ 问题描述

好的，在C#中我们有类似的东西:

OK, in C# we have something like:

public static string Destroy(this string s) { return ""; }

因此，基本上，当您有一个字符串时，您可以执行以下操作:

So basically, when you have a string you can do:

str = "This is my string to be destroyed"; newstr = str.Destroy() # instead of newstr = Destroy(str)

现在这很酷，因为在我看来，它更具可读性. Python有类似的东西吗?我的意思是不要这样写:

Now this is cool because in my opinion it's more readable. Does Python have something similar? I mean instead of writing like this:

x = SomeClass() div = x.getMyDiv() span = x.FirstChild(x.FirstChild(div)) # so instead of this

我想写:

span = div.FirstChild().FirstChild() # which is more readable to me

有什么建议吗?

推荐答案

一个星期后，我有一个最接近所要解决方案的解决方案.解决方案包括使用getattr和__getattr__.这是有兴趣的人的例子.

After a week, I have a solution that is closest to what I was seeking for. The solution consists of using getattr and __getattr__. Here is an example for those who are interested.

class myClass: def __init__(self): pass def __getattr__(self, attr): try: methodToCall = getattr(myClass, attr) return methodToCall(myClass(), self) except: pass def firstChild(self, node): # bla bla bla def lastChild(self, node): # bla bla bla x = myClass() div = x.getMYDiv() y = div.firstChild.lastChild

我还没有测试过这个例子，我只是给了它一个想法，以使谁可能感兴趣.希望有帮助.

I haven't test this example, I just gave it to give an idea for who might be interested. Hope that helps.