Python - joining item in list with strings

Question

I have looked everywhere, and can't find an answer. I am about 1-2 weeks old to Python so not very long. How can I join different items in lists with a string?

In my case, I want to show the 3D dimensions of an object: (Simplified a lot)

my_list = [1, 2, 3]
join_list = my_list[0],"x",my_list[1],"x",my_list[2]
print(join_list)

This returns with:

(1, 'x', 2, 'x', 3)

I am aiming to get 1x2x3 instead of (1, 'x', 2, 'x', 3). Any ideas? Thanks!

the str.join method concatenates everything in the list separating it by itself, in this case, 'x'. it's used with comma sometimes. Important note: you need to have a list of strings, that's why I called the `map` there, to cast all the numbers to strings. — Rafael Barros, Oct 26 '17 at 19:38

tdube · Accepted Answer · 2017-10-26T19:37:39.813

2

This is a simple Python str.join operation. The problem that I just realized was that you have to convert the integers in the list to strings first. You can do that with a simple list comprehension like this.

'x'.join([str(x) for x in my_list])

edited Oct 26 '17 at 19:37

answered Oct 26 '17 at 19:34

tdube

2,453
2
16
25

Im so dumb thanks :p – George_E -old Oct 26 '17 at 19:37
How would I do it though if they were other characters such as x/y/z? just wondering – George_E -old Oct 26 '17 at 19:37
In your follow-up, if `x`, `y`, and `z` are all numbers like above and you just wanted `/` characters in between, you could do `'/'.join([str(x) for x in my_list])`. If `x`, `y`, and `z` are strings in `my_list`, you could just do `'/'.join(my_list)`. – tdube Oct 26 '17 at 19:42
That's great @George_E! Stick with it! :) – tdube Oct 28 '17 at 14:51

score 0 · Answer 2 · answered Oct 26 '17 at 19:42

0

Try this

'x'.join(str(e) for e in my_list)

answered Oct 26 '17 at 19:42

mipurale

57
1
6

Python - joining item in list with strings

2 Answers2