importing program code

[Andrew Harrington]

I am new to Lyx and have no LaTeX experience.  I am writing a sequence 
of Python tutorials in a book document.  I tried switching from default 
book to AMS book because it supports numbered exercises and examples, 
however in the AMS system, each exercise appears to generate a new 
section number.  I do not want exercises to alter the section 
numbering.  I would ideally like exercises to either be numbered 
sequentually throughout the whole tutorial, or probably better, start 
again from 1 in each chapter or maybe section.  Something viewable 
easily in LyX would be good, though I am willing to handle my first ERT's.

Help appreciated.
Thanks,
Andy Harrington