I know what you're thinking. The book's cover announces that it covers both Python 2.6 and 3.x. Firing up Python on Ubuntu 9.04 (no, I haven't upgraded to Karmic Koala yet...give me a few days), brings up Python 2.6.2, but on Ubuntu 8.04 LTS (I need LTS on my production machine), I access Python 2.5.2, so a lot of "growing" has taken place recently ...