Chapter 3: About Null

[md-weber]

Create all necessary chapters about Null. The python koans can be a rule of thumb.

https://github.com/gregmalcolm/python_koans/blob/75b749221afea775b9c23d84a26b9790ea7bd09e/python3/koans/about_none.py

[DhanshreeA]

Hey @md-weber is this still under development? I'd love to contribute.

[md-weber]

Hi DhanshreeA sure feel free to add PRs to the repository and I am glad to incorporate them :)