Why Doesn't pygame.event.get() Return Events in a Separate Thread?

pygame.event.get() Not Returning Events in Thread

In an attempt to optimize user input handling, a user has implemented a thread to handle input events separately from the game's main loop. However, the problem arises when using pygame.event.get() within the thread, as it returns no events.

The explanation lies in the threading model used by pygame. According to its documentation, the event subsystem must be accessed from the main thread. This means that while it is possible to post events from other threads, the event queue itself must be handled in the main thread.

Therefore, to resolve this issue, one cannot call pygame.event.get() outside the main thread. Instead, one should use one of the following approaches:

• Posting events: Dispatch events from the separate thread to the main thread using pygame.event.post() to communicate user input.
• Using the EventQueue class: The pygame.event.EventQueue class allows for event handling in separate threads. By creating an event queue and passing it to the thread, events can be processed without modifying the main event queue.

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