A good fraction of bugs and exceptions I’ve seen in real python code bases is because the code itself didn’t handle the None edge cases at the exact moment they

A good fraction of bugs and exceptions I’ve seen in real python code bases is because the code itself didn’t handle the None edge cases at the exact moment they get created, and hence fail in a different place and let the debugging engineer scratching their head. If you write typed python code that lets you avoid this while writing the bad code at the beginning itself, that’s a win. Actual runtime errors caused due to invalid user input should of course throw appropriate exceptions deep in the code and bubble up and be handled in middleware.