I am working in Google Colab and am trying to save a filename such as fileName.mp3 as a variable. I then hope to use it in a bash/shell script command several cells later. I’ve done:

! input_file="fileName.mp3"

and

%%bash
input_file="fileName.mp3"

and

import os
os.environ['input_file'] = "fileName.mp3"

but none of these seem to work when I try to call ! echo $input_file later. What is a way I can save a variable into the environment for usage later?