Check out Google’s Python Classes – very easy and neat way of learning Python for all kinds of beginners (especially Neuroimagers – since Python is the future 
). These classes were taught by Nick Parlante – Many thanks to Nick 
I have embedded the videos below (from YouTube) for ease and here is the link to the exercises (as referred in the tutorials)
Tut 1 – Introduction, strings
Tut 2 – Lists and sorting
Tut 3 – Dicts and files
Tut 4 – Regular expressions
Tut 5 – Utilities
Tut 6 – Utilities urllib
Tut 7 – Conclusions
I plan to listen to these soon. Thanks for posting!