code: def calibrate_pressure(self):
          '''calibrate pressure'''
          if self.mavlink10():
              self.mav.command_long_send(self.target_system, self.target_component,
                                         mavlink.MAV_CMD_PREFLIGHT_CALIBRATION, 0,
                                         0, 0, 1, 0, 0, 0, 0)
          else:
              MAV_ACTION_CALIBRATE_PRESSURE = 20
              self.mav.action_send(self.target_system, self.target_component, MAV_ACTION_CALIBRATE_PRESSUREf calibrate_pressure(self):
          '''calibrate pressure'''
          if self.mavlink10():
              self.mav.command_long_send(self.target_system, self.target_component,
                                         mavlink.MAV_CMD_PREFLIGHT_CALIBRATION, 0,
                                         0, 0, 1, 0, 0, 0, 0)
          else:
              MAV_ACTION_CALIBRATE_PRESSURE = 20
              self.mav.action_send(self.target_system, self.target_component, MAV_ACTION_CALIBRATE_PRESSURE)
docs: calibrate pressure