SignalR Alternative for Python

What would be an alternative for SignalR in Python world?

To be precise, I am using tornado with python 2.7.6 on Windows 8; and I found sockjs-tornado (Python noob; sorry for any inconveniences). But sockjs supports just 3 types of events and there are some limitations; I need things like groups, subscribers, propagating and other features that SignalR provides.

What is SignalR connection?

SignalR handles connection management automatically, and lets you broadcast messages to all connected clients simultaneously, like a chat room. You can also send messages to specific clients.

You are probably looking for Twisted, a whole real-time engine for applications. https://twistedmatrix.com/trac/

If you do microframeworks, Flask (think Sinatra on ruby) also has a real-time module, but it's all barebones really, it might not be what you're looking for:

http://flask.pocoo.org/

Cheers.