from https://medium.com/@nick-tan/want-to-get-away-from-the-standard-looks-of-the-charts-or-graphs-generated-by-matplotlib-and-cbdd7baaeae
from https://medium.com/@nick-tan/want-to-get-away-from-the-standard-looks-of-the-charts-or-graphs-generated-by-matplotlib-and-cbdd7baaeae