将列表与元组列表进行比较? [英] Comparing a list to a a list of tuples?

问题描述

我有两个列表.一个只是一个 id 列表

I have two lists. One is simply a list of ids

ids = [123, 124, 127, 316, 463]

另一个是 id 和名称的元组列表

and the other is a list of tuples of id's and names

combined = [(123, "Brian"), (124,"Eric"), (222,"Jane")]

对这些进行设置比较的最简单方法是什么?我需要找出两件事 - 第一个列表中存在的 id 没有出现在第二个列表中，特别是 127, 316, 463 ，反之亦然，这将是 (222, "简").

What is the easiest way to do set comparisons on these? I need to find out two things - ids that exist in the first list that don't appear in the second list, specifically 127, 316, 463 and vice versa, which would be (222, "Jane").

我使用的是 Python 2.5.

I am using Python 2.5.

推荐答案

首先，您至少应该升级到 Python 2.7，如果没有阻止您这样做的话.

First of all, you should upgrade to Python 2.7 at the very least, if something doesn't prevent you from doing so.

如果要比较数字，可以将 ids 与 combined 中每个列表的第一个元素进行比较:

You can compare ids to the first element of each list in combined if you want to compare the numbers:

ids = [123, 124, 127, 316, 463]
combined = [(123, "Brian"), (124,"Eric"), (222,"Jane")]
combined_first = [x[0] for x in combined]

这篇关于将列表与元组列表进行比较?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IT屋！