Go to Moodle to find the Quiz for this Preparation.
Do the quiz as you watch the videos and do the reading. The quiz follows the same order as the videos/reading do.
You can access the videos from here or from Moodle; they both point to the same place.
All of the following are required except items labeled Optional are, well, optional (i.e., things that may be interesting but do not directly pertain to your success in this course).
Read all of:
EXCEPT the section titled “Python's range() vs xrange() Functions.” (That section is optional.).
Pay particular attention to the excerpt to the right.