Maintainers for python-matplotlib-data are Debian Python Team <team+python@tracker.debian.org>.
You may want to refer to the following packages that are part of the same source: python-matplotlib-doc, python3-matplotlib, python3-matplotlib-dbg.
You might like to refer to the python-matplotlib-data package page, to the Package Tracking System, or to the source package src:matplotlib's bug page.
If you find a bug not listed here, please report it.