Flask-Sock

Flask-Sock provides WebSocket support for Flask applications, enabling real-time, bi-directional communication. Unlike other solutions, it works directly with the Flask development web server and does not require a greenlet-based server like gevent or eventlet for basic operation. It is also compatible with production WSGI servers such as Gunicorn (with threading), Eventlet, or Gevent. The current version is 0.7.0, with a periodic release cadence.