Split words in string into nested lists of characters

Question

Can anyone help me with a list comprehension to split a string into a nested list of words and characters? i.e:

mystring = "this is a string"

Wanted ouput:

[['t','h','i','s'],['i','s'],['a'],['s','t','r','i','n','g']]

I've tried the following, but it doesnt split 'x' into nested list:

mylist = [x.split() for x in mystring.split(' ')]
print(mylist)
[['this'],['is'],['a'],['string']]

Possible duplicate of [How do I convert string characters into a list?](https://stackoverflow.com/questions/10610158/how-do-i-convert-string-characters-into-a-list) — mkrieger1, Oct 01 '18 at 21:09

score 4 · Accepted Answer · edited Oct 01 '18 at 21:10

4

[list(x) for x in mystring.split(' ')]

edited Oct 01 '18 at 21:10

ForceBru

answered Oct 01 '18 at 21:09

jwzinserl

score 2 · Answer 2 · answered Oct 01 '18 at 21:07

2

You can use a nested list comprehension:

[[j for j in i] for i in mystring.split()]

Yields:

[['t', 'h', 'i', 's'], ['i', 's'], ['a'], ['s', 't', 'r', 'i', 'n', 'g']]

answered Oct 01 '18 at 21:07

rahlf23

1

Or just `list(map(list, mystring.split()))`. – ForceBru Oct 01 '18 at 21:08
1

That's also a perfectly good solution. I figured this was more readable to the OP, that's all. – rahlf23 Oct 01 '18 at 21:09
2

Absolutely, your code is just as correct. My comment was meant to, you know, spark some admiration towards functional programming in people:) – ForceBru Oct 01 '18 at 21:13

score 1 · Answer 3 · answered Oct 01 '18 at 21:10

1

You need list(x) instead of x.split():

[list(x) for x in mystring.split()]

answered Oct 01 '18 at 21:10

V13

score 0 · Answer 4 · answered Oct 01 '18 at 21:32

0

Slightly similar to other answers

map(list,mystring.split(" "))

answered Oct 01 '18 at 21:32

mad_

4 Answers4