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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 _set_motion_handle(self, event):
 """Sets motion handle to currently grabbed handle """

        item = self.grabbed_item
        handle = self.grabbed_handle
        pos = event.x, event.y
        self.motion_handle = HandleInMotion(item, handle, self.view)
        self.motion_handle.GLUE_DISTANCE = self._parent_state_v.border_width
        self.motion_handle.start_move(pos)