I've constructed a worthwhile example, I think, based on a class that implements a stop list. A stop list is used to filter out articles, prepositions, and other words that do little to identify the subject of a document when indexing it in a search engine, for example.
I'd like to get comments back from the team and then complete the Java version. The Python version is attached. It needs some exception checking tests, but is otherwise fairly complete, I hope.
Please have a look at the attached python code (3 files, the tests runner, the test case, and the class being tested.)