Oh, that looks like a disaster. Edit: I can't judge without trying, but that's my initial thought.

I have masses of admiration and respect for Jeremy Howard and tried using this to build a bunch of fastapi endpoints.

I still have masses of admiration and respect for him, but no longer so much when it comes to software engineering - due to this, among other things. It seems like a great idea, but is clunky, hard to refactor and to integrate with other things, in my practice.

Wrapping production code in jupyter cruft doesn't work for me. Or, any code, really, that doesn't stay very small and stand alone.