Just to make this information available (I spend whole night trying to get this working and reading all over places about uWSGI websocket support).
uWSGI supports gevent (loop) and Websocket, but at their own premise. It does not mean, any app with websocket library is supported by uwsgi. Until, you import uwsgi, and start using their api's (as described in their doc), it probably won't work.
This means, if you are seeking a way to run Pyramid (or other framework) with gevent and gevent-socketio on uWSGI, it won't work.
Gunicorn seems working and there are examples available online.
If anyone found a way to get it running with uwsgi, please share :)