I'm working on a project that requires me to open CSV files, it must check that the file is open and then return it to main, I've written a function to do so and would like to know how it looks, if I've written it well or how I can improve it:

I'm working on a project that requires me to open CSV files. It must check that the file is open and then return it to main. I've written a function to do so and would like to know how it looks, if I've written it well or how I can improve it:

menu.py

open_csv.py