reflex-dev/xy
A charting library for Python, from the team behind the Reflex web framework. It renders interactive charts directly from Python objects, so the analysis and the chart live in the same place instead of the data being handed to a JavaScript layer to draw. It ships on PyPI, and that is what makes the adoption measurable: a download is someone installing it into a project, a star is someone bookmarking it, and those two numbers have been moving in opposite directions here for two weeks.
13,544 weekly downloads, up 21.4% in a day from 11,161, while stars did not move at all. Seventh straight appearance, and the gap between installing it and bookmarking it has never once closed.