Guido has eliminated lambda, map(), filter(), and reduce() from Python 3.0, sying in his blog, that "About 12 years ago, Python aquired lambda, reduce(), filter() and map(), courtesy of a Lisp hacker who missed them and submitted working patches. I think these features should be cut from Python 3000..." (
http://www.artima.com/weblogs/viewpost.jsp?thread=98196)
"I don't like reading code that was written by someone trying to use tail recursion. It's the ultimate code obfuscation." --GuidoVanRossum