That is really neat - I just installed it. I don't usually use Python (strongly preferring Ruby) but I want to experiment with Python + AppEngine (I am tired of the hassles with JRuby + AppEngine, and using Java + AppEngine is too easy :-)
I installed PyCharm a few hours ago and Dreampie will be good for light weight experiments.
Apart from 'irb/completion' I use 'wirble' [1] for colour highlighting of the output in Ruby/IRB [1]. I had to modify it to get it to work with Ruby 1.9 though [2]. I don't think anybody has done syntax highlighting for input.
I installed PyCharm a few hours ago and Dreampie will be good for light weight experiments.