CODEWITHSUNDEEP
pythonmultiprocessing
zaharpopov
zaharpopov

Reputation: 17282

python: multiprocessing Event

What is difference between multiprocessing.Event and multiprocessing.managers.SyncManager.Event. When do I use each? Why two different objects exist?

Same question for other similar objects existing in multiprocessing directly and also in Manager (Lock, etc.)

Upvotes: 16

Views: 5215

Answers (2)

Tobu
Tobu

Reputation: 25446

multiprocessing.Manager is essentially a specialised process that will create instances of multiprocessing's synchronisation primitives on demand in its own address space, and let you access them through RPC proxies. The primitives behave the same, and they have the added flexibility of being accessible from remote hosts (using TCP in the remote case).

Upvotes: 1

zaharpopov
zaharpopov

Reputation: 17282

Unfortunately, the only given answer is not very correct and others wasn't given.

I looked it up my own, and found that multiprocessing.Event can be used to synch between processes, it's completely alright.

Event and other objects from multiprocessing.Manager exist to be able to synchronize things between processes that runs on different machines via sockets under the hood. They also can be used synchronize on single machine, but less efficient for this than just using synch objects from multiprocessing.synchronize (like Event and Lock and others)

Upvotes: 14

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