I’m aware of the Jython project, but
it looks like this represents a way to
use Java and its libraries from within
Python, rather than the other way
round – am I wrong about this?
Yes, you are wrong. You can either call a command line interpreter to run python code using Jyton or use python code from Java. In the past there was also a python-to-Java compiler, but it got discontinued with Jython 2.2