Jython follows closely the Python language and its reference implementation CPython, as created by Guido van Rossum. Jython 2.7 corresponds to CPython 2.7. Jython is an implementation of the Python language for the Java platform. Jython 2.7 implements the same language as CPython 2.7, and nearly all of the Core Python standard library modules. (CPython is the C implementation of the Python language.) Jython 2.7 uses the same regression test suite as CPython, with some minor modifications.