Python:从字符串访问类属性 [英] Python: access class property from string

问题描述

我有一个如下所示的类:

I have a class like the following:

class User:
    def __init__(self):
        self.data = []
        self.other_data = []

    def doSomething(self, source):
        // if source = 'other_data' how to access self.other_data

我想为 doSomething 中的源变量传递一个字符串并访问同名的类成员.

I want to pass a string for the source variable in doSomething and access the class member of the same name.

我尝试过 getattr 只适用于函数(据我所知)以及让 User 扩展 dict 并使用 self.__getitem__，但这也不起作用.这样做的最佳方法是什么?

I have tried getattr which only works on functions (from what I can tell) as well as having User extend dict and using self.__getitem__, but that doesn't work either. What is the best way to do this?

推荐答案

x = getattr(self, source) 如果 source 命名了 self 的任何属性，就会完美地工作，包括示例中的 other_data.

x = getattr(self, source) will work just perfectly if source names ANY attribute of self, including the other_data in your example.

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