Ray is awesome and magical.

You can build really ergonomic distributed programs that are small wrappers around python classes.

I would prefer this to multiprocessing even if you are only on a single host.

I’ll totally second this. It takes away a lot of the tedium of multiprocessing programming.

I implemented it at my last job and it was a game changer. Simplified a lot of gnarly cluster management and let me focus on my code rather then figuring out how to distribute the work.