This errata is for the first printing (published 29 October 2007).
Page 50, line 5
Replace "advantage" with "advantages".
Page 52, fourth line from bottom
Replace "the + and operators" with "the + and * operators".
Page 62, line 10
The text mathmodule!math should simply read math.
Page 64, last line
There should be a space before left-associative.
Page 85, Exercise 2.32
This problem should not have appeared in this chapter, as it
requires techniques beyond those introduced in Chapter 2
(i.e., loops or list comprehension).