small medium large xlarge

The latest version of the book is B4.0, released about 1 month ago. If you've bought a PDF of the book and would like to update it to this version (for free), visit your home page.

By default this page displays the errata for the latest version of the book. If you have a previous version, select it here:

If you've found a new error, please submit it.

  • Typo
  • Tech. error
  • Suggestion
  • Maybe next edition
  • Not a problem
  • Reported in: B4.0 (23-Oct-18)
  • Fixed: 01-Dec-18, awaiting book release
#83810
PDF page: 21
I've been trying to run escape.py in Visual Studio Code and as usual had a few teething troubles setting up the environment. I found what I guess is ...more...
Frances Buontempo says: I left the print behind when checking 2.7, so have removed it now. Thanks for the if escaped suggestions - the point is you can try either. You guess a number, or let the code run until it stops. I think either way works. I have left the code as it is though. Glad you like the turtles.
  • Reported in: B4.0 (21-Nov-18)
  • Fixed: 01-Dec-18, awaiting book release
#83936
PDF page: 41

"let's cerate a GA since right now"--Scott McVay

Frances Buontempo says: Fixed in copy edit process.
  • Reported in: B4.0 (27-Nov-18)
  • Fixed: 01-Dec-18, awaiting book release
#83991
PDF page: 68
They can even move randomly but do not improvement over time if that is all they do. Should be: They can even move randomly but do not show impro...more...