为什么multiprocessing.Queue没有task_done方法

Question

为什么Queue.Queue有task_done方法而multiprocessing.Queue没有这种方法？

Answer 1

我认为您需要JoinableQueue 。

Answer 2

My guess would be: multithreading module was implemented very early, multiprocessing module came in 2.6 version.

The queue design was slightly corrected for multiprocessing and offers better flexibility than the multithreading , because you can choose between Queue , SimpleQueue and JoinableQueue depending on your use cases (speed vs reliability).

Now modifing multithreading like this would have caused backwards incompatibility, since join and task_done methods would have to be removed. Imagine the code needed to be refactored, new tests had to be written, API broken - for me clearly no benefits.