This is DreamPie - The Python shell you've always dreamed about!
Homepage: http://dreampie.sourceforge.net/
DreamPie can use a Python 3.1 in addition to the default 2.x. In order to use the Python 3.1 interpreter, you need to install the dreampie-python3 package:
su -c "yum install dreampie-python3"
In order to run DreamPie using the alternate python3 interpreter, start DreamPie with the interpreter binary's location as its first argument, like so:
dreampie /usr/bin/python3.1