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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def wheel_delta(self):
 		"""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. 		"""


		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