/usr/lib/python2.7/dist-packages/notebook/static/components/jquery-ui/themes/smoothness/jquery-ui.min.css is in python-notebook 5.2.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/notebook/static/components/jquery-ui/themes/smoothness/../../../../../../../../../share/javascript/jquery-ui/themes/base/jquery-ui.min.css