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Flask should just run on Python 3. If something doesn't work on Python 3, that does on Python 2.7 it's likely a bug and you should report it.

From page 3 of the book: "The code examples in this book have been verified to work with Python 2.7 and Python 3.3, so using one of these two versions is strongly recommended."

> My only wish was that he'd used something other than Heroku.

Heroku is just Linux. What do you want , windows server hosting? Using Heroku has been quite educational for me,as for how to manage a production server and good deployement techniques. Care to explain what the problem is?

I've had the early access version; the stuff on Heroku is at the tail end of the book and is a matter of c. 10 pages or so. So, don't let that put you off.