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Hi, I'm not sure about your definition of the service file. A quick google search lead me to https://github.com/RobotnikAutomation/robotnik_msgs/blob/master/srv/set_odometry.srv which provides a service definition and maybe was released for kinetic, so the path would be /opt/ros/kinetic/….

My assumption is you confused the package name with the service name here. Like in the Tutorial (http://wiki.ros.org/ROS/Tutorials/WritingServiceClient%28python%29) you have to from package_name.srv import *, so in your case from robotnik_msgs.srv import * (even though in general just import the things you need, so SetOdometry and SetOdometryRequest in this case)

If the command line command rossrv show robotnik_msgs/SetOdometry works, then the import statement of your python script should work as well.

Hope this helps.