Python - 将部分子列表的元素转换为int [英] Python - Convert partial sublist's elements into int

问题描述

假设您有以下列表：

[["a", "1", "2", "3"], ["b", "4", "5", "6"], ["c", "7", "8", "9"]]

我想将每个子列表的索引1到2的元素转换为整数，因为您可以看到它们本身就是字符串。可能吗？如果是，那么最简单的方法是什么？我现在做了什么：

And I want to convert the elements from index 1 to 2 of every sublist into integers as you can see they are themselves strings. Is it possible? If it is, then what is the shortest way to do it? What have I done uptil now is this:

lists = [["a", "1", "2", "3"], ["b", "4", "5", "6"], ["c", "7", "8", "9"]]
for l in lists:
    l[1:4] = [int(x) for x in l[1:4]]
print(lists)

推荐答案

如果你想在里面转换列表，你的代码就足够了。

If you want to convert the lists inplace, your code is good enough.

BTW，列表理解可以替换为 map ：

BTW, the list comprehension can be replaced with map:

l[1:4] = map(int, l[1:4])

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