问题
You’d like to define tasks with behavior similar to “actors” in the so-called “actor model.”
解决方案
The “actor model” is one of the oldest and most simple approaches to concurrency anddistributed computing. In fact, its underlying simplicity is part of its appeal. In a nutshell,an actor is a concurrently executing task that simply acts upon messages sent to it. Inresponse to these messages, it may decide to send further messages to other actors.Communication with actors is one way and asynchronous. Thus, the sender of a messagedoes not know when a message actually gets delivered, nor does it receive a responseor acknowledgment that the message has been processed.Actors are straightforward to define using a combination of a thread and a queue. Forexample:
from queue import Queuefrom threading import Thread, Event
Last, but not least, the concept of “sending” a task a message is something that can bescaled up into systems involving multiple processes or even large distributed systems.For example, the send() method of an actor-like object could be programmed to trans‐mit data on a socket connection or deliver it via some kind of messaging infrastructure(e.g., AMQP, ZMQ, etc.).