sed with python

[David Raleigh Arnold]

How do I use python as a wrapper for sed and/or gawk scripts?  I have
been using bash for my stuff, which relates mostly to lilypond, and I
wouldn't mind if windows users could find it more accessible.
I have written one very simple python
script and that's all.  O'Reilly's python books don't mention sed or
gawk.  Thanks in advance.  DaveA  

-- 
"We have learned the lessons of Viet Nam." --anon Spokesman
"Failure is not an option." --anon Spokesman
Can both be true? n  Are both false? y  Right answers get my vote. 
D. Raleigh Arnold dra@ http://www.openguitar.com  darnold4 at cox.net