/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/ is in python-networkx 1.9+dfsg1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/__init__.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/astar.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/dense.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/generic.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/tests/
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/tests/test_astar.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/tests/test_dense.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/tests/test_dense_numpy.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/tests/test_generic.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/tests/test_unweighted.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/tests/test_weighted.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/unweighted.py
/usr/lib/python2.7/dist-packages/networkx/algorithms/shortest_paths/weighted.py