The matplotlib.sankey module doesn’t get much attention, at least that is my impression when browsing the web for new Sankey diagrams. Maybe this is due to the fact that it primarily targets a tech audience, or at least people able to code in Python.

I have reported on this package back in 2011.

Here are two new examples from a Japanese blog.

And a top-down oriented Sankey diagram with arrows branching out to the right.

The project is on sourcefourge: API documentation, demos