code: def list_to_quat(quatlist):
      
      return geometry_msgs.msg.Quaternion(
          x=quatlist[0], y=quatlist[1], z=quatlist[2], w=quatlist[3])
docs: Convert a quaternion in the form of a list in geometry_msgs/Quaternion
      :param quatlist: [x, y, z, w]
      :return: