Passing arguments to service

[judiet]

Hello guys thank for your great work with roslibpy,

I'm trying to send data from a python script to a ROS service. I have trouble to pass the data to the service. Is there an opportunity to do so?

import roslibpy

client = roslibpy.Ros(host='localhost', port=9090)
client.run()
client.on_ready(lambda: call_service())

service = roslibpy.Service(client, '/distance_data', 'robocrawler/distance_data')

def call_service():
    #Trying to pass data here
    request = roslibpy.ServiceRequest()
    service.call(request, success_callback, error_callback)

def success_callback(result):
    print('Service response: ', result['dist'])

def error_callback(result):
    print('Something went wrong')

try:
    while True:
        pass
except KeyboardInterrupt:
    pass

client.terminate()

Thank you in advance.

[gonzalocasas]

Yes, passing values to the service is easy, just need to pass a dictionary to the service request constructor, i.e. request = roslibpy.ServiceRequest(dict(val1=3.14, some_other_val=dict(foo="bar")))

The dictionary you pass in to it needs to match the fields and data types expected by the ROS service you are calling.

[judiet]

Thank you very much for your quick response. You saved us the day. I close the issue.

[PINKY0212]

helloo guyss, I'm trying to send argument from a python script to a ROS service. I have trouble to pass the data to the service. Is there an opportunity to do so?

! /usr/bin/env python

import rospy from pkg_vb_sim.srv import vacuumGripper from pkg_vb_sim.srv import vacuumGripperRequest from pkg_vb_sim.srv import vacuumGripperResponse

from pkg_vb_sim.msg import LogicalCameraImage rospy.init_node('node_client') sos=rospy.ServiceProxy('/eyrc/vb/ur5_1/activate_vacuum_gripper', vacuumGripper) sos.wait_for_service() request = vacuumGripper(activate_vacuum_gripper = "true") sos.call(request) please help..where am i going wrong?? thanks in advance

[gonzalocasas]

@PINKY0212 I think you have the wrong repository. You are using rospy (the official python client for ROS within a ROS network), but this repository is for roslibpy (a library python library that connects to ROS via websockets from outside a ROS network).