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Z3 is a high-performance theorem prover being developed at Microsoft Research . http://research.microsoft.com/en-us/um/redmond/projects/z3/

Z3: Theorem Prover

Python Programming in your Browser: PythonAnywhere

online Python development - IDE, browser-based consoles, storage, web hosting, automated script runner. (disclosure: I work here!) by hjwp Jan 31

Dive Into Python

Dive Into Python is a free Python book for experienced programmers. It was originally hosted at DiveIntoPython.org, but the author has pulled down all copies. It is being mirrored here. http://www.diveintopython.net/

by far the best python tutorial for programmers that already know another language. by hjwp Jan 31

Google Code University › Programming Languages Welcome to Google's Python Class -- this is a free class for people with a little bit of programming experience who want to learn Python. The class includes written materials, lecture videos, and lots of code exercises to practice Python coding. http://code.google.com/edu/languages/google-python-class/

s Python Class - Google's Python Class - Google Code

http://docs.python-guide.org/en/latest/index.html

The Hitchhiker’s Guide to Python! — pythonguide 0.0.1 documentation

This opinionated guide exists to provide both novice and expert Python developers a best-practice handbook to the installation, configuration, and usage of Python on a daily basis.
http://www-inst.eecs.berkeley.edu/~cs61a/sp12/ Course documents available through these Web pages are either plain text files, Postscript files, or PDF (Portable Document Format) files.

CS 61A Home Page

http://www.checkio.org/ Welcome to CheckIO – a service that has united all levels of Python developers – from beginners up to the real experts!

Looking for the best solutions :: CHECKIO.ORG

CodingBat

http://codingbat.com/ Online code practice ( example problem ).
Welcome to learnpython.org's interactive Python tutorial. Whether you are an experienced programmer or not, this website is intended for everyone who wishes to learn the Python programming language. http://www.learnpython.org/

Learn Python - Free Interactive Python Tutorial

You will need a Google Account to start your learning journey.

Python Tutorial

http://www.pyschools.com/