是否有解决方法可以在单独的线程中清空事件队列？

Question

I used a separate thread to call pygame.event.get() for ages on Ubuntu without any problem. However MacOS throws an exception 'NSInternalInconsistencyException', reason: 'nextEventMatchingMask should only be called from the Main Thread!' ; and Windows reports the window to be (Not answering) after a few seconds of normal execution, which I assume to have the same explanation, meaning that Linux is tolerant to this software design unlike other OSes.

Is there any workaround to keep emptying the event queue in a separate thread, or does it basically mean that pygame 1.9.1 on python 2.7 cannot work that way at all?

I know GUI events are usually handled in main thread, but my Python lib is intended to be used with ipython. By design, the main thread, ie the user's ipython cells might be executing no operation or CPU-greedy loops, thus it can't take care of pygame.event.get() .

Answer 1

It is only possible to post events from other thread, but the event queue has to be handled in the main thread. See the documentation of pygame.event :

[...] The event subsystem should be called from the main thread. [...]

However, if you read on

[...] If you want to post events into the queue from other threads, please use the pygame.fasteventpygame module for interacting with events and queues module. [...]

See pygame.fastevent module:

pygame.fastevent is a wrapper for Bob Pendleton's fastevent library. It provides fast events for use in multithreaded environments.