How to convert array to string in python?

Question

i have array like below

arr = [1,2,3]

how can i convert it to '1,2,3' using python

i have a usecase where i want to add a filter parameter to url like below

url = some_url?id__in=1,2,3

i was initially thinking to pass it like so

url = some_url?id__in={arr}

but this is incorrect. i am new to python and i have browsed how to do this.

" ".join(str(x) for x in arr)

but this will give output '1 2 3'

how can i fix this. could someone help me with this. thanks.

Use ``",".join(str(x) for x in arr)`` instead of ``" ".join(str(x) for x in arr)``. — MisterMiyagi, Oct 05 '21 at 09:16
You are just missing comma (,) in your code. Use `",".join(str(x) for x in a)` — Pran Sukh, Oct 05 '21 at 09:21
What module are you using for performing request? Is it [`requests`](https://docs.python-requests.org/en/latest/)? Common way to send list is `?id__in=1&id__in=2&id__in=3"` not `id__in=1,2,3"` — Olvin Roght, Oct 05 '21 at 09:25

score 9 · Accepted Answer · answered Oct 05 '21 at 09:17

9

This gives you the 1,2,3 that you asked for.

",".join(str(x) for x in arr)

answered Oct 05 '21 at 09:17

Joshua Fox

score 3 · Answer 2 · answered Oct 05 '21 at 09:18

3

Try the below

arr = [1,2,3]
string = ','.join(str(x) for x in arr)
print(string)

output

1,2,3

answered Oct 05 '21 at 09:18

balderman

score 1 · Answer 3 · answered Oct 05 '21 at 09:18

1

You could join on the , character instead of a space:

",".join(str(x) for x in arr)

answered Oct 05 '21 at 09:18

Mureinik

3 Answers3