how to get self.paths.data from modules not "self" aware?

[l-o-u-i-s-g]

I'm trying to segregate my sqlite code from the UI code.
I can get the path for my sqlite database file with self.paths.data in the startup function but then how can I share that information with my other modules without having to pass self down the tree?
Is there a way to set application wide global variables at run time? That I could then call from my my_db.py file for example?
or should I use environment variables?
any other ideas on how would be the clean way to do this?

[rmartin16]

Since Toga only allows a single app to run in a process, you can access the app via toga.App.app. You'll just need to make sure your toga.App has been instantiated first.