code: def num_mode_groups(self):
  		
  
  		num = self._libinput.libinput_device_tablet_pad_get_num_mode_groups(
  			self._handle)
  		if num < 0:
  			raise AttributeError('This device is not a tablet pad device')
  		return num
docs: Most devices only provide a single mode group, however devices
  		such as the Wacom Cintiq 22HD provide two mode groups.
  
  		If multiple mode groups are available, a caller should use
  		:meth:`~libinput.define.TabletPadModeGroup.has_button`,
  		:meth:`~libinput.define.TabletPadModeGroup.has_ring`
  		and :meth:`~libinput.define.TabletPadModeGroup.has_strip` to associate
  		each button, ring and strip with the correct mode group.
  
  		Returns:
  			int: The number of mode groups available on this device.
  		Raises:
  			AttributeError