This release consists of the published code in the book and the following errata:

Chapter 5

• On page 132, in the section "Probability," the code line above the one marked with a (3), which reads for num in s: should instead read: for num in space.
• On page 139, in the code for simulating a fictional ATM, the statement probability = [1/6, 1/6, 1/3, 2/3] should be probability = [1/6, 1/6, 1/3, 1/3]. (Thanks to Luis Soares)

The solutions for the challenges are present in the solutions sub-directory of each chapter.