There was a manual input task that had to be done for several days, but I didn't have the confidence to transfer and write everything, so I found this lecture that was on sale, and I listened to the lecture diligently over the weekend and applied it to complete the necessary coding. I would like to thank you for creating a lecture that was perfect for me, and I am leaving an honest review. 1. No basic explanation at all - Although it is stated that basic Python grammar is required as a prerequisite, there was almost no mention of grammar, so I had to search the Internet here and there. In particular, the explanation of openpyxl and how it works was lacking, so I looked it up a lot. There are various libraries such as xlsxwriter in addition to openpyxl. 2. The tone of voice and the lecture style are not neat - Even if the tone of voice is like that, the lecture is so unorganized that I have to organize it myself in the middle and repeat and pause it to listen. Usually, other people use PPTs instead of coding programs to explain the current process, write methods, etc., but this lecture didn't have that, so it was difficult. 3. Poor ending - There is a 20-minute lecture in the middle, but it took longer than other lectures because an error occurred and it was fixed. But I can't believe it even after seeing the solution. You took what was there at the beginning and solved it with a loop?? I still don't get it. In the last lecture, if you made it with GUI, you should have shown a demonstration once, but this process was omitted, and someone even asked a question saying that they made it following the lecture and it was detected as a virus... And if you had given an answer, you should have given an additional lecture for other students later, or there should have been a mention in the <Lecture Introduction> section, but there isn't. ㄷㄷ -------------------------------------------------------------------------------------------------------------- Despite the above shortcomings, this lecture is the easiest course for beginners like me to approach among the methods of organizing Excel data using Python, and if you have patience and fully understand it, you can automate the work you really have to do in the office, so I give it full marks.