Pip package metadata doesn't include pyyaml as a requirement.
Metadata-Version: 2.0
Name: MadMimi
Version: 1.3
Summary: Python client for Mad Mimi
Home-page: http://developer.madmimi.com/
Author: Jordan Bouvier
Author-email: jordan.bouvier@analytemedia.com
License: UNKNOWN
Location: /Users/work/anaconda/envs/cjpMimi/lib/python2.7/site-packages
Requires: