Great work, but in my opinion using Flask for full-stack, end-to-end web development is wrong. A microframework should never be used as an end-all-be-all. By the time you're done you've added god knows how many external dependencies and bits of homegrown code to support "standard" features such as authentication, forms, etc. that are part of a proper full-stack (read: not micro) web framework. In this case, something like Django would be much more suitable because by the time you've finished this Flask tutorial you've basically implemented key parts of the Django standard library.