Surprised they use Flask.
I'm working on my first larger, industrial-strength REST API in Python and I've found the Django Rest Framework to be more suited once you get to that level of complexity.
I'm working on my first larger, industrial-strength REST API in Python and I've found the Django Rest Framework to be more suited once you get to that level of complexity.
This may be biased (I've been a Flask user since 0.7), and perhaps I'm stuck in my ways, but I've found I either need to find a supported and blessed Django plugin for the thing I need, or build something much more complex than I'd need in Flask.
For a company as specialized as Netflix, they probably are doing so much customization it doesn't matter much which framework they started with.
django-rest-framework is nice because it's maintained well and it's consistent with the rest of Django, but plenty of people just prefer the Flask way of doing things, even if it's a scrappier set of tools in some ways.
FWIW, I don't like DRF's reliance on serializers that do more than serialization.