Get service message data

edit

I have a service node server that handles a simple request by a client. The client sends an id (as a string), which the server then should read out. I am using rospy.

If I print the message in the server, it says "request: 1". I want to only extract the "1". How do I do that?

Rephrasing a bit: what "member" of the message do I have to call to get the raw data? Something like message.data.

Here's the handler:

def handle_cac(request):
    # receive goal id, return goal information
    print("Received this message: ")
    print request.data # this does not work! I'd like to just get the raw id, e.g. "1"
    for goals in root.getchildren():
        for goal in goals.getchildren():
            print goal.tag
            print goal.attrib
            if goal.attrib.text == request.data:
                print "Found goal: " + goal.name
                # print((root.findall("goals"))[0][0].attribute)
               return "nothing"

And here's the client:

def cac_client(request_message):
    print "Running request"
    rospy.wait_for_service('CAC')
    try:
        GetGoal = rospy.ServiceProxy('CAC', cac)
        resp1 = GetGoal(request_message)
        print resp1
        return resp1
    except rospy.ServiceException, e:
        print "Service call failed: %s" %e

if __name__ == "__main__":
    cac_client("1")