code: def create_and_append_rally_point(self, lat, lon, alt, break_alt, land_dir, flags):
          '''add a point via latitude/longitude'''
          p = mavutil.mavlink.MAVLink_rally_point_message(self.target_system, self.target_component,
                                                          self.rally_count(), 0, lat, lon, alt, break_alt, land_dir, flags)
          self.append_rally_point(pf create_and_append_rally_point(self, lat, lon, alt, break_alt, land_dir, flags):
          '''add a point via latitude/longitude'''
          p = mavutil.mavlink.MAVLink_rally_point_message(self.target_system, self.target_component,
                                                          self.rally_count(), 0, lat, lon, alt, break_alt, land_dir, flags)
          self.append_rally_point(p)
docs: add a point via latitude/longitude