If you have never used python for anything and are interested in trying out nitime, you can quickly get up and running, by following these 3 steps:
Install the EPD: The Enthought Python Distribution contains all the dependencies for using nitime and can be downloaded from here (free for academics): http://www.enthought.com/products/getepd.php
Use easy install to get nitime: Open a terminal window and enter:
easy_install --user nitime
Look at the Examples.