One of the languages developed on top of the Java Virtual Machine is the Jython, and this project began in 1997. the development of the language has been passed on to several lead developers until Sun Microsystems took over and worked full time on it. Jython 2.2 which is the latest release matches up to the CPython 2.2 release but later, its developers shifted to a new direction for its implementation using ASM and ANTLR to hasten development time. With the interactive interpreter found inside the jar file, you can discover the capabilities of Jython, most specially in executing files.