/usr/share/pyshared/maasserver/models/ is in python-django-maas 1.2+bzr1373+dfsg-0ubuntu1~12.04.6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/maasserver/models/__init__.py
/usr/share/pyshared/maasserver/models/bootimage.py
/usr/share/pyshared/maasserver/models/cleansave.py
/usr/share/pyshared/maasserver/models/component_error.py
/usr/share/pyshared/maasserver/models/config.py
/usr/share/pyshared/maasserver/models/dhcplease.py
/usr/share/pyshared/maasserver/models/filestorage.py
/usr/share/pyshared/maasserver/models/macaddress.py
/usr/share/pyshared/maasserver/models/managers.py
/usr/share/pyshared/maasserver/models/node.py
/usr/share/pyshared/maasserver/models/node_constraint_filter.py
/usr/share/pyshared/maasserver/models/nodegroup.py
/usr/share/pyshared/maasserver/models/nodegroupinterface.py
/usr/share/pyshared/maasserver/models/sshkey.py
/usr/share/pyshared/maasserver/models/tag.py
/usr/share/pyshared/maasserver/models/timestampedmodel.py
/usr/share/pyshared/maasserver/models/user.py
/usr/share/pyshared/maasserver/models/userprofile.py