The functions to be realized by the library management system:
1. Books or authors can be added through the add window, if the authors and books to be added already exist on the bookshelf, a corresponding prompt will be given.
2. If the author to be added exists, but the book to be added does not exist on the shelf, add the book to the author column.
3. If neither the author nor the book to be added exists on the shelf, add the book and author together.
4. There is a delete button next to each book and author. Click the button to delete the book to delete the book. If all the books in an author column are deleted, it will display "None".
5. If you click the Delete Author button directly, you can delete the author and his books together.
Implementing tools for this system; Python's Flask framework and MySQL database.
The renderings and source code are as follows:
