[dagw]

why would you use Flask instead of Django

If you don't really know Django, the learning curve on Flask is a lot shallower. So if you don't need ORMs, models, admin etc. but you just want make those python scripts you wrote callable via a web browser then you'll get version 0.1 out the door a lot sooner with Flask.

Also a lot of Django kind of assumes the ORM as your data store. So if you need to use a primary data store that cannot be accessed via the ORM you lose a lot of what Django has to offer.

That being said, I agree that many 'simple' Flask projects have a tenancy to grow until you have implemented most of Django in Flask anyway.