Just pulling together the best of the web on Python logging:
https://docs.python.org/2/library/logging.html
The standard library documentation.
http://pieces.openpolitics.com/2012/04/python-logging-best-practices/
Insightful and reviewed by Vinay Sajip.
http://victorlin.me/posts/2012/08/26/good-logging-practice-in-python
Helpful tips on which logger levels to use.
http://stackoverflow.com/questions/15727420/using-python-logging-in-multiple-modules
Answer provided by Vinay Sajip.
