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.
Python Functional Programming for Mathematicians by M. Nguyen.
Regular Expression HOWTO by A. M. Kuchling.
Static Code Analyzers by D. Hellmann.
Packages included in Sage
PyDSTool - Dynamical systems.
PyDy - Newtonian mechanics.
Pyjamas - Web and desktop framework.
PyNIfTI - Medical imaging.