How to convert array to string in python? [duplicate]

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.

Answer 1

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

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