Links for contextdecorator
contextdecorator-0.10.0.tar.gz
contextdecorator-0.10.0.zip
http://code.google.com/p/contextdecorator/
http://docs.python.org/library/contextlib.html
http://docs.python.org/library/contextlib.html#contextlib.contextmanager
http://docs.python.org/reference/datamodel.html#object.__exit__