[Tutor] online "study guides"

[Darren Reynolds]

has anyone come across any worthwhie "study guides" concerning python 
that they could recommend to someone new to the language?  i've got an 
idea for a tool i want to try writing for myself that i think python 
would be perfect for.  in the past i've always found it easier to pick 
things up by having little "exercises" to work on with a corresponding 
answer sheet or whathaveyou to reference what i've done against.