Python / Cython resources
Tutorials, books, etc.
Dive into Python by M. Pilgrim.
How to Think Like a Computer Scientist: Learning with Python by J. Elkener, A. B. Downey, and C. Meyers.
Python for Software Design by A. B. Downey.
Articles, HOWTOs, etc.
decorator by M. Simionato.
Functional Programming HOWTO by A. M. Kuchling.
Regular Expression HOWTO by A. M. Kuchling.
Packages included with Sage
Pexpect - Spawn and control processes.
ZODB - Object database.