/usr/lib/python3/dist-packages/sphinx/search/ is in python3-sphinx 1.3.6-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/sphinx/search/__init__.py
/usr/lib/python3/dist-packages/sphinx/search/da.py
/usr/lib/python3/dist-packages/sphinx/search/de.py
/usr/lib/python3/dist-packages/sphinx/search/en.py
/usr/lib/python3/dist-packages/sphinx/search/es.py
/usr/lib/python3/dist-packages/sphinx/search/fi.py
/usr/lib/python3/dist-packages/sphinx/search/fr.py
/usr/lib/python3/dist-packages/sphinx/search/hu.py
/usr/lib/python3/dist-packages/sphinx/search/it.py
/usr/lib/python3/dist-packages/sphinx/search/ja.py
/usr/lib/python3/dist-packages/sphinx/search/nl.py
/usr/lib/python3/dist-packages/sphinx/search/no.py
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/danish-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/dutch-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/finnish-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/french-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/german-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/hungarian-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/italian-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/norwegian-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/porter-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/portuguese-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/romanian-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/russian-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/spanish-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/swedish-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/non-minified-js/turkish-stemmer.js
/usr/lib/python3/dist-packages/sphinx/search/pt.py
/usr/lib/python3/dist-packages/sphinx/search/ro.py
/usr/lib/python3/dist-packages/sphinx/search/ru.py
/usr/lib/python3/dist-packages/sphinx/search/sv.py
/usr/lib/python3/dist-packages/sphinx/search/tr.py