code: def delta(self):
  		
  
  		delta_x = self._libinput.libinput_event_tablet_tool_get_dx(self._handle)
  		delta_y = self._libinput.libinput_event_tablet_tool_get_dy(self._handle)
  		return delta_x, delta_y
docs: The delta between the last event and the current event.
  
  		If the tool employs pointer acceleration, the delta contained in this
  		property is the accelerated delta.
  
  		This value is in screen coordinate space, the delta is to be
  		interpreted like the value of :attr:`.PointerEvent.delta`.
  		See `Relative motion for tablet tools`_ for more details.
  
  		Returns:
  			(float, float): The relative (x, y) movement since the last event.