Well, Campbell, since the main topic of the book is "Classic Computer Science Problems", I'd say that you wouldn't need to know the really esoteric Python stuff. After all, Knuth, Djikstra,
et. al. managed to to just fine with languages they made up on the spot.
So I'd imagine the usual stuff: expressions and assignments, conditionals, methods and modules, control and looping, basic
string manipulation, and since this is Python, tuples, lists, and dictionaries. Anything more complex, I'd look to see explained in the book.
Oh, you weren't just posting to bump the odds of winning a copy were you?