You can download the latest version of Python from https://www.python.org/downloads/ for this chapter.
Alternative Python interpreter implementations can be found at the following sites:
- Stackless Python: https://github.com/stackless-dev/stackless
 - PyPy: https://pypy.org
 - Jython: https://www.jython.org
 - IronPython: https://ironpython.net
 - MicroPython: https://micropython.org
 
The code files for this chapter can be found at https://github.com/PacktPublishing/Expert-Python-Programming-Third-Edition/tree/master/chapter1.