I am pleased to say that the OpenAI-based code autocompletion supports Sanic well, understanding its concepts such as Blueprints, different response types, how to read login form fields from request, writes @auth_required handler decorator wrapper using jwt in authorization header etc. I suppose this means that on Github there are plenty of projects using Sanic for the neural network to learn its thing 
For those who didn’t hear yet, there’s a demo at https://copilot.github.com/
It’s free to use but it will spy on all code you write after that though.