/usr/share/pyshared/ is in python-zope.keyreference 3.6.4-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/zope/
/usr/share/pyshared/zope.keyreference-3.6.4-nspkg.pth
/usr/share/pyshared/zope.keyreference-3.6.4.egg-info/
/usr/share/pyshared/zope.keyreference-3.6.4.egg-info/PKG-INFO
/usr/share/pyshared/zope.keyreference-3.6.4.egg-info/SOURCES.txt
/usr/share/pyshared/zope.keyreference-3.6.4.egg-info/dependency_links.txt
/usr/share/pyshared/zope.keyreference-3.6.4.egg-info/namespace_packages.txt
/usr/share/pyshared/zope.keyreference-3.6.4.egg-info/not-zip-safe
/usr/share/pyshared/zope.keyreference-3.6.4.egg-info/requires.txt
/usr/share/pyshared/zope.keyreference-3.6.4.egg-info/top_level.txt
/usr/share/pyshared/zope/keyreference/
/usr/share/pyshared/zope/keyreference/__init__.py
/usr/share/pyshared/zope/keyreference/configure.zcml
/usr/share/pyshared/zope/keyreference/interfaces.py
/usr/share/pyshared/zope/keyreference/persistent.py
/usr/share/pyshared/zope/keyreference/persistent.txt
/usr/share/pyshared/zope/keyreference/testing.py
/usr/share/pyshared/zope/keyreference/tests.py