Hello, i'm trying to control mobile robot 'rb1 base', it has elevate function which can move its head up and down. You can see the Service caller in the down side of the picture, it has the service topic named '/rb1_base/robotnik_base_control/set_elevator', based on that information, i wrote the service call program, you can see this top of the picture. In the SetElevator.h there is only one variable named 'int32 action', if i make the action variable to 1 then the robot elevate up, if i make it to -1 then the robot elevate down. so i wrote the code 'srv(1)' to elevate up the robot. But it says 'AttributeError : 'int' object has no attribute 'action''. Is there special way to change the variable 'int32 action'? Is it not just int?

here is the code.

from random import sample
from math import pow, sqrt
from actionlib_msgs.msg import *
from geometry_msgs.msg import Pose, PoseWithCovarianceStamped, Point, Quaternion, Twist
from move_base_msgs.msg import MoveBaseAction, MoveBaseGoal
from robotnik_msgs.srv import SetElevator, SetElevatorRequest, SetElevatorResponse
import rospy
import actionlib



class MultiPointNav():
    def __init__(self):
        rospy.init_node('multi_point_nav', anonymous=True)

        rospy.on_shutdown(self.shutdown)

        # How long in seconds should the robot pause at each location?
        self.rest_time = rospy.get_param("~rest_time", 3)

        # Are we running in the fake simulator?
        self.fake_test = rospy.get_param("~fake_test", False)

        # Goal state return values
        goal_states = ['PENDING', 'ACTIVE', 'PREEMPTED', 
                       'SUCCEEDED', 'ABORTED', 'REJECTED',
                       'PREEMPTING', 'RECALLING', 'RECALLED',
                       'LOST']


        locations = dict()

        locations['Point1'] = Pose(Point(-0.64500000000, 0.82600000000, 0.000), Quaternion(0.000, 0.000, 0.000, 1.000))
        locations['Point2'] = Pose(Point(-1.24000000000, -0.95300000000, 0.000), Quaternion(0.000, 0.000, 0.000, 1.000))
        #locations['Point3'] = Pose(Point(-2.50947999954, -5.9229183197, 0.000), Quaternion(0.000, 0.000, 0.000, 1.000))
        #locations['Point4'] = Pose(Point(-12.919, -23.867, 0.000), Quaternion(0.000, 0.000, 0.000, 1.000))
        #locations['Point5'] = Pose(Point(1.471, 1.007, 0.000), Quaternion(0.000, 0.000, 0.480, 0.877))
        #locations['Point6'] = Pose(Point(-0.861, -0.019, 0.000), Quaternion(0.000, 0.000, 0.892, -0.451))

        # Publisher to manually control the robot (e.g. to stop it, queue_size=5)
        self.cmd_vel_pub = rospy.Publisher('/rb1_base/cmd_vel', Twist, queue_size=5)

        # Subscribe to the move_base action server
        self.move_base = actionlib.SimpleActionClient("rb1_base/move_base", MoveBaseAction)

        rospy.loginfo("Waiting for move_base action server...")

        # Wait 60 seconds for the action server to become available
        self.move_base.wait_for_server(rospy.Duration(60))

        rospy.loginfo("Connected to move base server")

        # A variable to hold the initial pose of the robot to be set by 
        # the user in RViz
        initial_pose = PoseWithCovarianceStamped()

        # Variables to keep track of success rate, running time,
        # and distance traveled
        n_locations = len(locations)
        n_goals = 0
        n_successes = 0
        i = n_locations
        distance_traveled = 0
        start_time = rospy.Time.now()
        running_time = 0
        location = ""
        last_location = ""

        # Get the initial pose from the user
        rospy.loginfo("*** Click the 2D Pose Estimate button in RViz to set the robot's initial pose...")
        rospy.wait_for_message('/rb1_base/initialpose', PoseWithCovarianceStamped)
        self.last_location ...