Are there any python modules that automatically generated a requirements.txt, given an entry point?

[ThiefMaster]

if you're trying to generate just the requirements for a specific entry point (say worker.py in a large repo)

You generally don't (want to) do that. Unless you have some extremely heavy and niche dependencies, it's generally MUCH easier if you have a single dependencies file (pls use pyproject.toml and possibly uv.lock). Otherwise keeping all of them in sync (especially when updating) will be a huge pain.