python找到两个列表之间的区别 [英] python find difference between two lists

问题描述

我是编程新手，但我一直在学习，最近我碰壁了，所以我寻求帮助. 抱歉，如果之前已经讨论过，但是我找不到我的问题的答案. 我有两个清单.我需要比较它们，并在结果中得到不匹配的对象.例如:

I am new to programming but I keep learning, and recently I hit the wall so I'm asking for help. Sorry if this was discussed before, but I can't find answer to my problem. I have two lists. And I need to compare them, and in the result to get the objects that DON'T match. For example:

a = [1,2,3,4,5,6]
b = [1,2,3,4,5,6,7,8,9]
result = [7,8,9].

我似乎只找到返回匹配项的代码和示例.我不需要.

And I only seem to find code and examples that return matches. Which I don't need.

列表位于文件记事本file.txt 中，如果您有帮助，请您记住. :)

Lists are in file notepad file.txt for you folks to keep in mind if you this helps you to help me. :)

推荐答案

您可以将列表转换为集合并运行常规的

You can convert the lists to sets and run the usual set operations such as difference or symmetric difference. For example, set(b) - set(a) evaluates to set([7, 8, 9]).

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