The systemd source indicating udev is GPL license:
systemd$ vim LICENSES/README.md
The following exceptions apply:
* some udev sources under src/udev/ are licensed under **GPL-2.0-or-later**, so the
udev binaries as a whole are also distributed under **GPL-2.0-or-later**.
While the corresponding python package pyudev is LGPL license: https://pypi.org/project/pyudev/
Any idea is more then welcome
