You'll find the download for the 'Jython standalone' here:
[Jython download][1]
[1]: http://www.jython.org/downloads.html
I created a 'bat' file to run it (because of classpath sSettings).
java -jar jython-standalone-2.5.4-rc1.jar -Dpython.path=MyClasspathDir's
Then I try to instanciate a DataDomainObject DataAccessObject (fails at Ivy.persistence().get...)
Hope this helps. The idea was to have a interactive application console...