问题：
I have some data either in a list of lists or a list of tuples, like this: 我在列表列表或元组列表中都有一些数据，如下所示：
data = [[1,2,3], [4,5,6], [7,8,9]]
data = [(1,2,3), (4,5,6), (7,8,9)]
And I want to sort by the 2nd element in the subset. 我想按子集中的第二个元素排序。 Meaning, sorting by 2,5,8 where 2 is from (1,2,3) , 5 is from (4,5,6) . 意思是，按2,5,8排序，其中2来自(1,2,3) ， 5来自(4,5,6) 。 What is the common way to do this? 常见的做法是什么？ Should I store tuples or lists in my list? 我应该在列表中存储元组或列表吗？
解决方案：
参考一： https://stackoom.com/question/D6AV/如何按给定索引处的元素对列表-元组进行排序-列表-元组参考二： https://oldbug.net/q/D6AV/How-to-sort-list-tuple-of-lists-tuples-by-the-element-at-a-given-index
来源：oschina
链接：https://my.oschina.net/u/3797416/blog/4405597