Quite a nice introduction to monads, one of the main concepts used in functional programming.
A really worth seeing presentation about the database migration stuff developed in the new Django. This is not released yet, but can be used with the newest Django. I’ve checked it, and the migrations are much easier than with South.
The Part 1
A couple of years ago I wrote a simple article about the virtualenv. A kind of a very basic tutorial. To my huge surprise, it has been linked on a couple of websites which lead to quite a huge number of readers.
Since then I’ve changed how I work with the virtualenv, so here is a more updated version of the tutorial. A much better way.