python workspace structuring

edit

I am currently struggling to setup a python ros workspace.. I've been following this guide

http://duckietown.mit.edu/media/pdfs/...

and my src folder looks like this

src
├── CMakeLists.txt -> /opt/ros/indigo/share/catkin/cmake/toplevel.cmake
└── service
    ├── CMakeLists.txt
    ├── include
    │   └── service
    │       ├── __init.py__
    │       └── util.py
    ├── package.xml
    ├── setup.py
    └── src
        └── publisher.py

When i run rosrun service publisher.py i get the error message:

line 5, in <module>
    from service import util 
ImportError: cannot import name util

setup.py

## ! DO NOT MANUALLY INVOKE THIS setup.py, USE CATKIN INSTEAD
from distutils.core import setup
from catkin_pkg.python_setup import generate_distutils_setup
# fetch values from package.xml
setup_args = generate_distutils_setup(
packages=['service'],
package_dir={'': 'include'},
)
setup(**setup_args)