How to remove extra css using python mincss?

Question

css

The video showed how to clean extra / unused css selectors in the html file using python mincss. But they did not show how to install this same mincss library in python. Installed python, I can't figure it out further.
https://www.youtube.com/watch?v=Vg7XvAJz7H4

Answer 1

You go to cmd.exe or any other terminal. You enter "pip install mincss".
Further, in the code, at the beginning, you write "import mincss" or "from mincss import *". There will be errors - write.
PS Complexity of a question "simple".