Originally called JPython (but changed for some odd legal reason) Jython is a reimplementation of Python that produces bytecode for (and thus runs on) Java Virtual Machines. Jython is developed seperately, but tracks Python's new language features and the stable version currently complies with the Python 2.0 language spec. Jython can be found at: http://www.jython.org/
some odd legal reason Yes, that would be the pinhead manager at CNRI who didn't believe in OpenSource and tried to own it for the company. The name Jpython is theirs forever. But the team split. Some people don't get the difference between "free thought" and "free beer" (source: Guido! http://www.python.org/doc/essays) -- Paul
Also see http://www.python.org/doc/essays/ppt/hp-training where Guido compares python and java coding styles -- Paul
Jython features a very tight and easy to use binding between Python language constructs and Java language constructs. I'll get into more detail later as I have time -- Wilhelm