Earlier quoted context omitted.
Get the story from the horse's mouth: http://oppugn.us/posts/1272050135.html
I decided to learn Python recently, and I ran into "Dive Into Python" as a recommended resource (I think I Googled "Python book"), and it almost did put me off the language. It's not really the author's fault, it is the fault of those who recommend it.
Besides the ODBC stuff etc. that Zed comments on (never dived into the book that deeply) its biggest problem is that the writing style is extremely, annoyingly, time-wastingly redundant.
I remember it explaining the same stuff over and over, worded slightly differently, easily spanning a dozen pages for every simple thing. After the n-th "I got it the first time, move on!" feeling I stopped reading it.