A less verbose, in loc and exposition, example can be found here:<p><a href="http:&#x2F;&#x2F;www.jroller.com&#x2F;languages&#x2F;entry&#x2F;python_writing_a_compiler_and" rel="nofollow">http:&#x2F;&#x2F;www.jroller.com&#x2F;languages&#x2F;entry&#x2F;python_writing_a_comp...</a>