Thanks for your feedback, Florian.

When I started to write this and other blogs on various Python skills, I had a similar thought as you do. Should I write this or that, many of which are basic topics, like you said Python 101?

But when I write more, I realize that many readers on the platform have little or no programming/Python knowledge. They're here just beginning their programming learning. You'll be suprised that they only know just the very basics about dictionaries and other data types/functions. In that sense, some of these operations are indeed advanced to them.

What's good about Medium is that there are tons of articles on any given topic. I bet that you can always find something that can help you.