This is a tutorial for the Python web framework Tornado, version 6.0 and later. It uses the standard asyncio event loop, and adds support for web servers and clients, template handling, websockets, and much more.
This tutorial shows an example of a web frontend (under frontend/) and a web service
backend (under fortunes/.
It reads fortune cookie files from several other github repositories and returns a combined
page (or JSON response) for them.
The examples show how to do parallel HTTP requests (frontend/app.py, fortunes/data.py,
getparallel.py), how to write a simple HTTP webserver (frontend/app.py), and a somewhat
less simple web service backend server (fortunes/serve.py).