@eric_ma I know you were looking for a book or docs, which I don’t have, but I did take a course from Talk Python Training by Chris Moffitt. It focuses on moving from Excel to Python and the Pandas library. He also has one on data visualization. Here is the link to the training: https://training.talkpython.fm/courses/move-from-excel-to-python-and-pandas. And here is a link to some blog posts by Chris. https://pbpython.com