I'm currently trying to develop a proof of concept for a possible idea but am unsure if this is even possible.

We have application A, written in wxPython, which will not receive any code updates. It's too late in its life and will impact too many people. In a specific case which we wish to automatic - a GUI window pops up asking user to select an option from the list.

We want to develop script or "application B" which listens for this GUI to pop up and automatically makes the choice. It can be a script that runs in the background at all times.

Now.. from my understanding I don't think it's possible without some interprocess communication going on. Since we cannot change anything in application A the problem seems unsolvable. Any ideas? Am I missing something about how I could use wxPython?