How to use SyncManager.Lock or Event correctly?

Question

I\'m having trouble using SyncManager.Lock correctly. I read the official doc, but it offers no working example. I also have no idea how to use SyncManage

Answer 1

I figured out a workaround. Don't use the builtin SyncManager.Lock() for the following reasons:

1. It's creating a new Lock object every time instead of sharing.
2. It wraps around threading.Lock(), NOT multiprocess.Lock(). Looks like it doesn't work with multiprocessing!

Solution is to register your own lock manager:

from multiprocessing.managers import BaseManager, AcquirerProxy
global_lock = mp.Lock()

def get_lock():
    print('getting global_lock')
    return global_lock

Server.register('Lock', get_lock, AcquirerProxy)