> The saying is to do with the software you're writing right now - do you include a framework (e.g. Django, Ruby on Rails, Spring) or do you include libraries t

> The saying is to do with the software you're writing right now - do you include a framework (e.g. Django, Ruby on Rails, Spring) or do you include libraries that you could swap out (e.g. Flask - which terms itself a "micro framework", but is a library for this definition, ReactJS, SQLAlchemy) and your code is in control. I'd say by this definition (your code calls a library, a framework calls your code), Flask is every bit as much a framework as Django; I write functions that are called by the router just like I do for Django views. Sure, I can swap out the ORM and the templating library; I might even be able to swap out the routing library, but here be dragons. But a standard Flask application and a standard Django application are very similar. And if I wrote an application using Flask, it would be more or less a rewrite to swap in something else for Flask, because I'd be depending on Flask's request and response objects, at minimum. This is partly why I don't think this definition is very useful, too. Clearly Django and Flask are different, but this isn't why.