These conventions should be followed in all code:

 * http://code.google.com/p/soc/wiki/PythonStyleGuide
  * Limit line length to 80 characters
 * Use " " for strings, UNLESS the string contains a ", in which case use '
 * All functions outside of classes should have the prefix shn_<Model Name>_
 * All classes which over-ride existing classed should have the suffix "S3"
 * Some automated bug analysis / code quality checking tools -
   * [http://www.logilab.org/857 PyLint]
     * gives detailed report
     * code quality score tells exact impact of the changes made
     * http://www.logilab.org/card/pylint_tutorial
   * [http://pychecker.sourceforge.net/ PyChecker] recommended in [http://code.google.com/p/soc/wiki/PythonStyleGuide PythonStyleGuide]