如何使用子字符串对字符串列表进行排序? [英] How to sort this list of strings using a substring?

问题描述

我有一个列表，其元素如下:

I have a list whose elements are like the following:

Region_1.csv, Region_33.csv, Region_2.csv, Region_4.csv, Region_105.csv, ....

该列表中的所有数字都在1-105之间，不丢失. 我想根据地区编号对该列表进行排序，使其看起来像这样:

The list has all numbers ranging from 1-105 with none missing. I want to sort this list according to the region number such that it looks like this:

Region_1.csv, Region_2.csv, Region_3.csv, Region_4.csv, Region_105.csv etc.

由于数字的位数是可变的，所以我很难对这个列表进行排序.

Since the numbers have variable digits, I am struggling to sort this list.

谢谢.

推荐答案

您可以将sorted与自定义功能一起使用，先按.然后按_拆分:

You can use sorted with a custom function, splitting first by . and then by _:

res = sorted(L, key=lambda x: int(x.split('.')[0].split('_')[-1]))

print(res)

['Region_1.csv', 'Region_2.csv', 'Region_4.csv', 'Region_33.csv', 'Region_105.csv']

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