I find the general layout suggested for Angular apps to be a bit weird. There are prominent articles by Angular devs that suggest splitting things into services, models etc. I guess it just follows the familiar pattern that Rails etc give you.

I've recently built a couple of large(ish) python web apps. I use Flask for the web frontend but instead of starting with Flask I built all the libraries / core code first and then use Flask to tap into that. It makes for a much better application structure. Instead of thinking about how you should be splitting into blueprints you really think about the application structure as a whole (and you remove dependencies on the framework). I'm _much_ happier with the results.

I'm refactoring the Angular frontend at the moment so the example you've pointed to is a timely piece of code for me to skim. Thanks!