code: def wheel_delta(self):
  		
  
  		delta = self._libinput.libinput_event_tablet_tool_get_wheel_delta(
  			self._handle)
  		changed = self._libinput.libinput_event_tablet_tool_wheel_has_changed(
  			self._handle)
  		return delta, changed
docs: The delta for the wheel in degrees and whether it has changed in
  		this event.
  
  		Returns:
  			(float, bool): The delta of the wheel, in degrees, compared to
  			the last event and whether it has changed.