Modern Python Standard Library Cookbook

How it works...

The multiprocessing.Manager class acts as a server that is able to store values accessible by any process that has a reference to Manager and to the values it wants to access.

Manager itself is accessible by knowing the address of the socket or pipe where it is listening, and each process that has a reference to the Manager instance knows those:

>>> manager = multiprocessing.Manager()
>>> print(manager.address)
/tmp/pymp-4l33rgjq/listener-34vkfba3

Then, once you know how to contact the manager itself, you need to be able to tell the manager which object you want to access out of all that the manager is managing.

That can be done by having Token that represents and pinpoints that object:

>>> namespace = manager.Namespace() ...