I've enjoyed reading a lot of Peter Norvig's python code. There is his Lisp implemention (http://norvig.com/lispy.html http://norvig.com/lispy.html). He also

I've enjoyed reading a lot of Peter Norvig's python code. There is his Lisp implemention (http://norvig.com/lispy.html http://norvig.com/lispy.html). He also created a spell checker that was an informative and interesting read.