Sanic

Sanic (http://sanic.readthedocs.io/) is another interesting project, which specifically tries to provide a Flask-like experience with coroutines.

Sanic uses uvloop (https://github.com/MagicStack/uvloop) for its event loop, which is a Cython implementation of the asyncio loop protocol using libuv, allegedly making it faster. The difference might be negligible in most of your microservices, but ;is good to take any speed gain when it is just a transparent switch to a specific event loop implementation.

If we write the previous example in Sanic, it's very close to Flask:

    from sanic import Sanic, response 
 
    app = Sanic(__name__) 
 
    @app.route("/api") 
    async def api(request): 
        return response.json({'some': 'data'}) 
 
    app.run() 

Needless to say, the whole framework is inspired by Flask, and you will find most of the features that made it a success, such as Blueprints.

Sanic also has its original features, like the ability to write your views in a class (HTTPMethodView...