Visualizations with matplotlib for python

[niazangels]

Hello John,

First, thank you for writing one of the most enjoyable books in the domain!

One thing that puzzled me was since most of the code was in python, why did we not have the charts and visualizations in python as well. Since I did not know R, I spend quite some time into recreating these with matplotlib while I was working thought the book. (example here: https://github.com/niazangels/bandits/blob/master/01-epsilon-greedy.ipynb)

I know there hasn't been any commits to this repo fo a while, but I was wondering if you would be interested in adding these to your repo. If so what would be a good way to structure them (my plots are in Jupyter notebooks, but I can split them into files).

I could raise a pull request in case you're interested, but feel free to close this issue if this isn't something you'd like to pursue.