Make sure you have Cassandra 2.1+ installed, and Spark 1.4. Also, Cassandra's bin directory needs to be in your PATH.
Run setup.sh:
./setup.sh
This will download the JAR required to use Cassandra + Spark 1.4, create the required keyspace & tables for the exercises, and download the movie lens dataset. It'll also install the Python requirements.
To run:
./pys
This should fire up an iPython notebook. Click exercises to begin. Solutions are in the solutions notebook. Resist the urge to check it till you've done all the exercises.