/usr/share/pyshared/ is in python-zc.catalog 1.6-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/zc/
/usr/share/pyshared/zc.catalog-1.6-nspkg.pth
/usr/share/pyshared/zc.catalog-1.6.egg-info/
/usr/share/pyshared/zc.catalog-1.6.egg-info/PKG-INFO
/usr/share/pyshared/zc.catalog-1.6.egg-info/SOURCES.txt
/usr/share/pyshared/zc.catalog-1.6.egg-info/dependency_links.txt
/usr/share/pyshared/zc.catalog-1.6.egg-info/namespace_packages.txt
/usr/share/pyshared/zc.catalog-1.6.egg-info/not-zip-safe
/usr/share/pyshared/zc.catalog-1.6.egg-info/requires.txt
/usr/share/pyshared/zc.catalog-1.6.egg-info/top_level.txt
/usr/share/pyshared/zc/catalog/
/usr/share/pyshared/zc/catalog/__init__.py
/usr/share/pyshared/zc/catalog/browser/
/usr/share/pyshared/zc/catalog/browser/README.txt
/usr/share/pyshared/zc/catalog/browser/__init__.py
/usr/share/pyshared/zc/catalog/browser/configure.zcml
/usr/share/pyshared/zc/catalog/browser/ftesting.zcml
/usr/share/pyshared/zc/catalog/browser/tests.py
/usr/share/pyshared/zc/catalog/callablewrapper.txt
/usr/share/pyshared/zc/catalog/catalogindex.py
/usr/share/pyshared/zc/catalog/configure.zcml
/usr/share/pyshared/zc/catalog/extentcatalog.py
/usr/share/pyshared/zc/catalog/extentcatalog.txt
/usr/share/pyshared/zc/catalog/globber.py
/usr/share/pyshared/zc/catalog/globber.txt
/usr/share/pyshared/zc/catalog/i18n.py
/usr/share/pyshared/zc/catalog/index.py
/usr/share/pyshared/zc/catalog/interfaces.py
/usr/share/pyshared/zc/catalog/legacy.txt
/usr/share/pyshared/zc/catalog/normalizedindex.txt
/usr/share/pyshared/zc/catalog/setindex.txt
/usr/share/pyshared/zc/catalog/stemmer.py
/usr/share/pyshared/zc/catalog/stemmer.txt
/usr/share/pyshared/zc/catalog/tests.py
/usr/share/pyshared/zc/catalog/valueindex.txt