add possibility to disable multiprocessing for debugging purpose w/o changing code

[vlomshakov]

Hey! Sometimes I have to debug my code in sequential mode. But duplicating code (parallel and sequential execution) looks ugly. It seems to me that introducing DummyWorkerPool is good solution for this purpose, it just call the function sequentially in loop w/o any overhead. What do you think?

[sybrenjansen]

Hi @vlomshakov , I can imagine that for quick testing purposes that might be useful.

I think the minimum working functionality of a dummy pool should be:

• map should return a list, imap should still return a generator
• worker_id, worker_state, shared_objects, worker_init and worker_exit should still work
• progress bar could still work with simply wrapping it in a vanilla tqdm wrapper

All the other stuff will be disabled because they're only useful when actually using workers.

Would that work?

[vlomshakov]

yes, it would be perfect. Thanks!

[sybrenjansen]

Alright, perfect. I will try to put some hours in at the end of this year.