Python

• A Beginner's Python Tutorial
• A Guide to Python's Magic Methods - Rafe Kettler
• Automate the Boring Stuff - Al Sweigart
• Biopython (PDF)
• Building Skills in Object-Oriented Design (Python) (PDF) (2.1.1)
• Building Skills in Python (PDF) (2.6)
• Byte of Python (3.5.1)
• Code Like a Pythonista: Idiomatic Python
• CodeCademy Python
• Composing Programs (3.x)
• Data Structures and Algorithms in Python - B. R. Preiss
• Dive into Python - Mark Pilgrim (2.3)
• Dive into Python 3 - Mark Pilgrim (3.0)
• Full Stack Python
• Google's Python Class (2.4 - 2.x)
• Google's Python Style Guide
• Hacking Secret Cyphers with Python - Al Sweigart (3.3)
• High Performance Python (PDF)
• Hitchhiker's Guide to Python! (2.6)
• Python Guide
• Welcome to Problem Solving with Algorithms and Data Structures - Brad Miller and David Ranum
• Wikibooks: Python Programming (2.7)