Training course from Miguel Grinberg page
https://courses.miguelgrinberg.com/courses
https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-iii-web-forms
Training course from Miguel Grinberg page
https://courses.miguelgrinberg.com/courses
https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-iii-web-forms