Python / Cython resources
Library tools - errno, functools, gettext, glob, inspect, itertools, locale, logging, multiprocessing, optparse, os, os.path, pdb, pickle, re, shutil, string, subprocess, sys, tabnanny, threading, time, timeit, trace, traceback, urllib2.
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.
Static Code Analyzers by D. Hellmann.
Packages included in Sage
Pexpect - Spawn and control processes.
ZODB - Object database.
PyDy - Newtonian mechanics.
Pyjamas - Web and desktop framework.
PyNIfTI - Medical imaging.