Why are these comments so hostile?
Why aren't you satisfied with his own explanations that you already knew about?
"I looked around for a language that was closer to the pseudocode in the book, and discovered Python was the closest. [...] Python is an excellent language for my intended use. It is easy to use (interactive with no compile-link-load-run cycle), which is important for my pedagogical purposes."
"I looked for the language that was most like our pseudocode, and found that Python was the best match. Then I had to teach myself enough Python to implement the examples from the textbook. I found that Python was very nice for certain types of small problems, and had the libraries I needed to integrate with lots of other stuff, at Google and elsewhere on the net."
I'm sure I would learn something if I read through the code in more detail, but that's true of a ton of things and time is what it is. I merely commented on what I personally find interesting and uninteresting. Also, even I, a non-Director of Research at Google and non-computer scientist, don't particular enjoy using the language I use on a day-to-day basis for fun in my personal time.