/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/ is in python3-networkx 1.8.1-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_betweenness_centrality.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_betweenness_centrality_subset.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_closeness_centrality.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_communicability.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_current_flow_betweenness_centrality.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_current_flow_betweenness_centrality_subset.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_current_flow_closeness.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_degree_centrality.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_eigenvector_centrality.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_katz_centrality.py
/usr/lib/python3/dist-packages/networkx/algorithms/centrality/tests/test_load_centrality.py