获取子列表的第一个元素作为python中的字典键 [英] Get first element of sublist as dictionary key in python

问题描述

我看了一下，但没有找到答案(我对python还是很陌生).

I looked but i didn't found the answer (and I'm pretty new to python).

问题很简单.我有一个由子列表组成的列表:

The question is pretty simple. I have a list made of sublists:

ll
[[1,2,3], [4,5,6], [7,8,9]]

我想做的是创建一个字典，将每个子列表的第一个元素作为键，并将对应的子列表的值作为值，例如:

What I'm trying to do is to create a dictionary that has as key the first element of each sublist and as values the values of the coorresponding sublists, like:

d = {1:[2,3], 4:[5,6], 7:[8,9]}

我该怎么做?

推荐答案

使用 dict理解:

{words[0]:words[1:] for words in lst}

输出:

{1: [2, 3], 4: [5, 6], 7: [8, 9]}

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