As much as I love the Python language, it is shameful how it has become a sort of "schtrumpf"-like addition to any computer-related stuff. Such introductory tutorials are great (but this one, specifically, would benefit much by having the code that generates each figure next to it). However, it is really not necessary to specify that your particular thing is "with Python" as if it really meant anything fundamental.
What kind of shitty reasoning leads to this? "Oh, let's introduce this elementary mathematics to the illiterate masses by writing it as a Python script. Now everyone will understand it!" This is a lack of respect for the agency of the readers.