Run python script in a CI CD step

Question

I need some assistance because I am new to DevOps and this entire field.

I already have a pipeline that I made.

I recently wrote a python script that gets a JSON file, replaces some items, and modifies the file's content (I tested it with a local file).

This Python code must now be added to my pipeline tasks; this task should copy and parse a repository file.

I searched Google in an effort to locate a solution, but I came up empty.

Even where to put the Python script is beyond me.

Can somebody put me in the right route, please?

I sincerely appreciate it.