Pulseaudio push-to-talk

from libinput import ContextType, EventType, KeyState, LibInput

      seat = 'seat0'

      li = LibInput(context_type=ContextType.UDEV)
      li.assign_seat(seat)

      for event in li.events:
          if event.type == EventType.KEYBOARD_KEY:
              keycode = event.key
              ks = event.key_state
              key_press = ks is KeyState.PRESSED
              print("Code: {} | State: {}".format(keycode, "↓" if key_press else "↑"))