Is there a way to interact with other apps using python while i'm doing other things?

Question

For example if I want to simulate inputs in a game while I'm doing something else like writing an essay on Word. Is there a way to do all this?

This is the best I can explain it I'm sorry if I'm confusing.

Also, I just want to know if this is possible and what libraries I'd need to install. I don't need the code. Thanks!