430319 (1) [Avatar] Offline
Section 1.4, "Why learn Python 3?", has out-of-date numbers for py3readiness.org. That site now lists 345 of 360 packages as Python 3 ready. I realize this will likely change again before you go to print (and that this is minor), but I noticed it and thought I'd point it out.
naomi.ceder (108) [Avatar] Offline

Of course whatever number I use, it will be out of date by publication (which is a great problem to have!), but since I'm in the process of doing final revisions, I'll update that.