Tornado is a Python web framework and asynchronous networking library built to handle high traffic. It features a non-blocking network I/O that enables numerous simultaneous connections.

Many discussions about Python web frameworks begin with Flask, and for good reason. Flask is a well established, well understood framework that is easy to use and quite stable.

The Causal Models library, a Python and R framework, which uses PyArrow and RPy2, and allows scientists to contribute new models for causal inference. Meanwhile Netflix’s visualizations library ...