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2014-03-25 08:31:52 -0500	answered a question	can't access std_srvs i did try this: atention for type Empty into msg and srv for import msg `from std_msgs.msg import String, Float32, Empty` for import service - without problem Empty `import std_srvs.srv` publish message `take.publish(Empty())` call service `rospy.ServiceProxy('ardrone/flattrim', std_srvs.srv.Empty())` good luck!

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