Python documentation
Python version 2 vs Python version 3
The Python Tutorial:
https://docs.python.org/2/tutorial/
https://docs.python.org/3/tutorial/
The Python wiki
Python Software Foundation
The Python Standard Library:
https://docs.python.org/2/library/index.html
https://docs.python.org/3/library/index.html
The Python Language Reference:
https://docs.python.org/2/reference/index.html
https://docs.python.org/3/reference/index.html
The Python C/API Reference Manual:
https://docs.python.org/2/c-api/index.html
https://docs.python.org/3/c-api/index.html
Extending and embedding the python interpreter:
https://docs.python.org/2/extending/index.html
https://docs.python.org/3/extending/index.html
PEP 8 -- Style Guide for Python Code
We can use flake8 tool to check style of python code:
Flake8 tool to check python source code
Python Strings Tutorial
Problem Solving with Algorithms and Data Structures
Using Assertions Effectively
virtualenv - How to set up a python Virtual Environment
Examples of code
Calculate PI digits (arbitrary-precision) using Python