So this targets an earlier version of Python?

Yes, the 2.x series. I am learning with Python 3 because of a class I am taking and supplementing with Zed's tutorial and just writing the examples in Python 3 format. So far, so good. I might hit a snag when I get to the web.py stuff but I will try to convert that to P3 before using it. All of it rolled together is helping me a lot.

Yes, and for a reason. Python 3 is still not widely adopted [sic].

Python 3 Wall of Shame: http://python3wos.appspot.com/

Stop the "wall of shame" shtick, please. It helps nobody. Projects know about Python 3 and projects are planning to move to Python 3. It isn't trivial and there is no "shame" in it at all.