The hotkey catching function hangs the application, how to avoid it?

Question

Python

It is necessary to catch pressing the hotkey when the application is not in focus. The Internet gave the only instruction, it, in principle, works, the done print is displayed, but the program freezes and does not react to anything other than pressing the hotkey. And it hangs as usual - with painting over and a Windows request to stop or wait. However, all this time, pressing works fine even with a frozen program.

COMBINATIONS = [
            {keyboard.Key.shift, keyboard.KeyCode(char='~')},
            {keyboard.Key.shift, keyboard.KeyCode(char='`')}
        ]

        current = set()

        def on_press(key):
            if any([key in COMBO for COMBO in COMBINATIONS]):
                current.add(key)
                if any(all(k in current for k in COMBO) for COMBO in COMBINATIONS):
                    print('done')

        with keyboard.Listener(on_press=on_press) as listener:
            listener.join()

Answer 1

You can't stop the event loop, which listener.join()is exactly what it does. Run the handler in a separate one QThreadand send signals from it to the main thread.