/usr/lib/python2.7/dist-packages/pyNN/nest/ is in python-pynn 0.7.4-1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/pyNN/nest/__init__.py
/usr/lib/python2.7/dist-packages/pyNN/nest/cells.py
/usr/lib/python2.7/dist-packages/pyNN/nest/connectors.py
/usr/lib/python2.7/dist-packages/pyNN/nest/electrodes.py
/usr/lib/python2.7/dist-packages/pyNN/nest/recording.py
/usr/lib/python2.7/dist-packages/pyNN/nest/simulator.py
/usr/lib/python2.7/dist-packages/pyNN/nest/standardmodels/
/usr/lib/python2.7/dist-packages/pyNN/nest/standardmodels/__init__.py
/usr/lib/python2.7/dist-packages/pyNN/nest/standardmodels/cells.py
/usr/lib/python2.7/dist-packages/pyNN/nest/standardmodels/synapses.py
/usr/lib/python2.7/dist-packages/pyNN/nest/synapses.py