Pym (Python for you and me) - good for people who are new to the language and programming in general
Think Python - slightly advanced
The Hitchhiker's guide to Python
(more can be found as PDFs in the books folder)
Codeacademy Python course - in browser, ideal for people who are new to programming and have little time to dedicate to learning
EDX self-paced course - free to take, requires a bit of tech knowledge, 99 USD for certification, requires more time and effort
MIT's gentle introduction to programming using Python
Learn Python - in browser, interactive tutorial