Sanic
Async Python 3.6+ web server/framework
...It provides a way to get a highly performant HTTP server up and running fast, while also making it easy to build, expand, and eventually scale.
Sanic aspires to be as simple as possible while delivering the performance that you require. It allows the usage of the async/await syntax added in Python 3.5, so your code is guaranteed to be non-blocking and speedy. It's also ASGI compliant, so it's possible to deploy with an alternative ASGI webserver.