test_service.py

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#!/usr/bin/env python
import roslib; roslib.load_manifest('wviz')
import rospy
import time

from std_msgs.msg import String
from pr2_pick_and_place_service.srv import *

def listener():
        rospy.init_node('test_service', anonymous=True)
    
        rospy.wait_for_service('pick_and_place_detect_object')
        try:
                detect_object = rospy.ServiceProxy('pick_and_place_detect_object', DetectObjects)
                resp1 = detect_object('d')
                print 'Service call succeeded'
                print 'Received %d objects' % (len(resp1.objects),)
        except rospy.ServiceException, e:
                print "Service call failed"
    
if __name__ == '__main__':
    listener()