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copied!<p>One possible approach is to build your own <a href="http://en.wikipedia.org/wiki/Stack_machine" rel="nofollow">stack machine</a> in software to interpret and execute Python <a href="http://docs.python.org/release/2.5.2/lib/bytecodes.html" rel="nofollow">byte code</a> directly. Certainly not a porting job and quite labor-intensive to implement, but a self-contained Python byte code stack processor built for your embedded system gets you around needing an operating system.</p> <p>Another approach is writing your own low level executive (one step below a general purpose OS) that contains the bare minimum in services that a core Python interpreter port requires. I am not certain if this is more or less labor intensive than building a stack processor. </p> <p>I am not recommending either of these approaches - personally, I like Charlie Martin's Minix 3 approach best since it is a balanced requirements compromise. On the other hand, what I suggest might be interesting if your project absolutely requires Python without an operating system <I>and</I> if the project has an excellent time and money budget.</p> <p><strong>Update 5 Mar 2012</strong>: Given a strict adherence to your Python/No OS requirements, another possibility of a path to a solution may lie in using an OS-less Java VM (e.g., <a href="http://www.jnode.org/" rel="nofollow">jnode</a>, currently in beta) and use <a href="http://en.wikipedia.org/wiki/Jython" rel="nofollow">Jython</a> to create Java byte code from Python. Certainly not an ideal off-the-shelf solution, and it does seem to meet an OS-less Python requirement.</p>

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