I started without knowing Python. I bought it to refer to the book Jump to Python and used it as a reference during the lecture. To conclude, the lecture seems to have been created for basic learning by providing various practice problems to help with understanding. However, unlike the book that tries to make all readers understand in writing, the lecture was given by explaining it verbally, so there were some ambiguous expressions, so it was difficult to understand those parts through the lecture. However, after studying the parts I didn't understand in the lecture with the book, I listened to the lecture again and understood them 100%. Therefore, for those who are studying Python for the first time like me, it would be very effective to buy a reference book and study the parts I didn't understand through the lecture. In addition, since the answers to questions are given within a day, it was a really good lecture because I was able to resolve my curiosity.