Bash Zenity Python

I have three python versions installed in my computer, each one has differents modules and configurations, I want to have a single file that let me choose the python binary file that I wish to use; so I decided to develop a Bash / Zenity script with a Python binary list allowed to use (and a GNome desktop shortcut entry to access it from the Main menu).

Do you have a project idea? Let's make it together!