I think its not Peter Norvig who coded that stuff, its students/contributors who kept doing the exercises in the book and someone finally put all of it together

I think its not Peter Norvig who coded that stuff, its students/contributors who kept doing the exercises in the book and someone finally put all of it together...they have implementations in various languages..you can find a link at norvig.com...this is the text book we use for AI for our grad course. Good standard book.