python:按子列表中的项目对列表列表进行排序 [英] python: sort a list of lists by an item in the sublist

问题描述

我有一个包含用户和得分的列表列表，如下所示:

I have a list of lists that contains users and scores as follows:

[["user1", 100], ["user2", 234], ["user3", 131]...]

我想生成一个列表，该列表按分数按降序对用户进行排序:

I want to produce a list that sorts the users by score in declining order:

[["user2", 234], ["user3", 131], ["user1", 100]...]

我应该怎么做这种事情?

How might I go about doing this kind of sort?

推荐答案

>>> li = [["user1", 100], ["user2", 234], ["user3", 131]]
>>> 
>>> import operator
>>> 
>>> sorted(li, key=operator.itemgetter(1))   # Ascending order
[['user1', 100], ['user3', 131], ['user2', 234]]

>>> sorted(li, key=operator.itemgetter(1), reverse=True)  # Reverse Sort
[['user2', 234], ['user3', 131], ['user1', 100]]

这篇关于python:按子列表中的项目对列表列表进行排序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！