/usr/lib/pyshared/ is in python-ns3 3.17+dfsg-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/pyshared/python2.7/
/usr/lib/pyshared/python2.7/ns/
/usr/lib/pyshared/python2.7/ns/_core.so
/usr/lib/pyshared/python2.7/ns/antenna.so
/usr/lib/pyshared/python2.7/ns/aodv.so
/usr/lib/pyshared/python2.7/ns/applications.so
/usr/lib/pyshared/python2.7/ns/bridge.so
/usr/lib/pyshared/python2.7/ns/buildings.so
/usr/lib/pyshared/python2.7/ns/config_store.so
/usr/lib/pyshared/python2.7/ns/csma.so
/usr/lib/pyshared/python2.7/ns/csma_layout.so
/usr/lib/pyshared/python2.7/ns/dsdv.so
/usr/lib/pyshared/python2.7/ns/dsr.so
/usr/lib/pyshared/python2.7/ns/emu.so
/usr/lib/pyshared/python2.7/ns/energy.so
/usr/lib/pyshared/python2.7/ns/fd_net_device.so
/usr/lib/pyshared/python2.7/ns/flow_monitor.so
/usr/lib/pyshared/python2.7/ns/internet.so
/usr/lib/pyshared/python2.7/ns/lte.so
/usr/lib/pyshared/python2.7/ns/mesh.so
/usr/lib/pyshared/python2.7/ns/mobility.so
/usr/lib/pyshared/python2.7/ns/mpi.so
/usr/lib/pyshared/python2.7/ns/network.so
/usr/lib/pyshared/python2.7/ns/nix_vector_routing.so
/usr/lib/pyshared/python2.7/ns/olsr.so
/usr/lib/pyshared/python2.7/ns/point_to_point.so
/usr/lib/pyshared/python2.7/ns/point_to_point_layout.so
/usr/lib/pyshared/python2.7/ns/propagation.so
/usr/lib/pyshared/python2.7/ns/spectrum.so
/usr/lib/pyshared/python2.7/ns/stats.so
/usr/lib/pyshared/python2.7/ns/tap_bridge.so
/usr/lib/pyshared/python2.7/ns/tools.so
/usr/lib/pyshared/python2.7/ns/topology_read.so
/usr/lib/pyshared/python2.7/ns/uan.so
/usr/lib/pyshared/python2.7/ns/virtual_net_device.so
/usr/lib/pyshared/python2.7/ns/visualizer.so
/usr/lib/pyshared/python2.7/ns/wifi.so
/usr/lib/pyshared/python2.7/ns/wimax.so