/usr/lib/python2.7/dist-packages/trytond/model/ is in tryton-server 2.2.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/trytond/model/__init__.py
/usr/lib/python2.7/dist-packages/trytond/model/browse.py
/usr/lib/python2.7/dist-packages/trytond/model/cacheable.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/
/usr/lib/python2.7/dist-packages/trytond/model/fields/__init__.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/binary.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/boolean.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/char.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/date.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/field.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/float.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/function.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/integer.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/many2many.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/many2one.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/numeric.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/one2many.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/one2one.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/property.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/reference.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/selection.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/sha.py
/usr/lib/python2.7/dist-packages/trytond/model/fields/text.py
/usr/lib/python2.7/dist-packages/trytond/model/model.py
/usr/lib/python2.7/dist-packages/trytond/model/modelsingleton.py
/usr/lib/python2.7/dist-packages/trytond/model/modelsql.py
/usr/lib/python2.7/dist-packages/trytond/model/modelstorage.py
/usr/lib/python2.7/dist-packages/trytond/model/modelview.py
/usr/lib/python2.7/dist-packages/trytond/model/modelworkflow.py