Slides to accompany this talk are available https://docs.google.com/presentation/...

The introduction of async/await and asyncio has lead to an explosion of new web frameworks bringing many new ideas. Yet the enduring WSGI frameworks have been slow, and often unable, to adopt these new features - particularly the two most popular frameworks, Django and Flask.

With the recent Django 3.0 supporting async/await, the focus is switching to Flask - why isn't Flask async?

This talk will discuss the approaches taken in the past to support async/await in Flask, where they struggled, and the challenges in general. It will then show how inspiration has been taken from Django to introduce support in the upcoming Flask-2.0 release.