"What is Python? Python is an interpreted,
interactive, object-oriented programming language. It incorporates
modules, exceptions, dynamic typing, very high level dynamic data
types, and classes. Python combines remarkable power with
very clear syntax. It has interfaces to many system calls and
libraries, as well as to various window systems, and is extensible
in C or C++. It is also usable as an extension language for
applications that need a programmable interface. Finally,
Python is portable: it runs on many brands of UNIX, on the
Mac, and on PCs under MS-DOS, Windows, Windows NT, and OS/2."
(Python FAQ)
"What is JPython? JPython is a new implementation
of the Python programming language which is designed to run on the
Java Platform. It consists of a compiler to compile Python source
code down to Java bytecodes which can run directly on a JVM, a set
of support libraries which are used by the compiled Java bytecodes,
and extra support to make it trivial to use Java packages from
within JPython." (JPython FAQ)