The first programming riddle on the net

There are currently 33 levels.

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What people have said about us: "These sorts of things are in my opinion the best way to learn a language.", brberg at Media Cloisters "It's the best web site of the year so far.", Andy Todd at halfcooked "Addictive way to learn the ins and outs of Python.. a must for all programmers!", salimma at stumbleupon "This challenge is fantastic. Clever, addictive and really gets your mind working. I feel like I'm playing Myst.", James Tauber after finishing level 22. "I've been using Python since 1991, and while I've always enjoyed it, I have to confess this is the most Python fun I've had this century! Excellent work. Thank you!", Tim Peters "If you've got any Python chops, I highly recommend giving it a shot. The puzzles are very well constructed, and the clues are clever. I felt continually challenged, but almost never at a total loss for things to try.", Thiamin Trek at 96db.com

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