The ipython shell (http://ipython.scipy.org/ http://ipython.scipy.org/) was great to experiment and learn with, and it's a huge productivity boost every day. It

The ipython shell (http://ipython.scipy.org/ http://ipython.scipy.org/) was great to experiment and learn with, and it's a huge productivity boost every day. It's where I do most of my work. It would be very hard for anyone going back to the plain python shell after trying ipython.