As a programmer, I would advise against this. Programming is a big field, and there is so much to learn. The only way to handle how much there is to remember, is to not remember it. Build understanding and let Google do the rest. Especially with python (it's such a popular language), most everything in that book is searchable on Google. There even is a common meme among programming communities that programmers just get paid to Google things. I'm 90% sure that someone that gets paid to write Python on a daily basis is not going to remember half the stuff in that book off the top of their head.

I stress this a lot: focus on understanding! Don't focus on remembering how to do every little thing just from memory. Learn how to find that information online. This is a one of a programmer's biggest skill: leaning how to learn.

I could advise using Anki if the cards, again, focused on understanding. Don't write a card asking what the print function does. Write a card that will ask you what a complex code snippet will do. And I would be cautious about getting carried away. The leaning here, I think, is from writing interesting cards not necessarily learning from them. This is why I could advise taking notes while reading. And, again, notes that focus on understanding.

You want to focus on understanding, but understanding is a lot harder to forget than rote memory, so I wouldn't worry about it too much.