/usr/share/pyshared/pyface/viewer/ is in python-pyface 4.1.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/pyface/viewer/__init__.py
/usr/share/pyshared/pyface/viewer/api.py
/usr/share/pyshared/pyface/viewer/column_provider.py
/usr/share/pyshared/pyface/viewer/content_provider.py
/usr/share/pyshared/pyface/viewer/content_viewer.py
/usr/share/pyshared/pyface/viewer/default_tree_content_provider.py
/usr/share/pyshared/pyface/viewer/label_provider.py
/usr/share/pyshared/pyface/viewer/table_column_provider.py
/usr/share/pyshared/pyface/viewer/table_content_provider.py
/usr/share/pyshared/pyface/viewer/table_label_provider.py
/usr/share/pyshared/pyface/viewer/table_viewer.py
/usr/share/pyshared/pyface/viewer/tree_content_provider.py
/usr/share/pyshared/pyface/viewer/tree_item.py
/usr/share/pyshared/pyface/viewer/tree_label_provider.py
/usr/share/pyshared/pyface/viewer/tree_viewer.py
/usr/share/pyshared/pyface/viewer/viewer.py
/usr/share/pyshared/pyface/viewer/viewer_filter.py
/usr/share/pyshared/pyface/viewer/viewer_sorter.py