what is the python interpreter what is source code what is byte code what is the pvm name two or more variations on python' standard execution model how are cpythonjythonand ironpython different what are stackless and pypytest your knowledgeanswers the python interpreter is program that runs the python programs you write source code is the statements you write for your program--it consists of text in text files that normally end with py extension byte code is the lower-level form of your program after python compiles it python automatically stores byte code in files with pyc extension the pvm is the python virtual machine--the runtime engine of python that interprets your compiled byte code psycoshed skinand frozen binaries are all variations on the execution model in additionthe alternative implementations of python named in the next two answers modify the model in some fashion as well--by replacing byte code and vmsor by adding tools and jits cpython is the standard implementation of the language jython and ironpython implement python programs for use in java and net environmentsrespectivelythey are alternative compilers for python stackless is an enhanced version of python aimed at concurrencyand pypy is reimplementation of python targeted at speed pypy is also the successor to psycoand incorporates the jit concepts that psyco pioneered test your knowledgeanswers