Programming Challenges Sites

Hi, I was just wandering if anyone could recommend one(or a few). The only good one I found was projecteuler. If you need to know, I'm using python.

I like topcoder.com. They have tons of competitions in various categories and languages. Some offer cash prizes and job opportunities. I'm only knowledgeable enough to compete in the algorithm contests at the moment, but there are many others to choose from. They do have contests in Python.

Here is a link to an article about coding sites that has a number of good links, including topcoder.

http://grok-code.com/214/practice-your-code-fu-programming-contests-and-puzzles-online/

since you enjoy python I will suggest http://www.pythonchallenge.com/. Its not a challenge as in competing against others though, but more like a series of levels you must complete. Similar to this site but all programming. (Note you dont need python but obviously helps in some areas)

thanks for that site. I'm working on python now while I have some time off between semesters. Just went through the first few challenges, and learned some new things.

Thanks, guys. I already used pythonchallenge, but it was a bit too PIL oriented for me (if I'm right about which site it was). Some nice challenges though.