/usr/lib/python3/dist-packages/networkx/utils/ is in python3-networkx 1.11-2.
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..
/usr/lib/python3/dist-packages/networkx/utils/__init__.py
/usr/lib/python3/dist-packages/networkx/utils/contextmanagers.py
/usr/lib/python3/dist-packages/networkx/utils/decorators.py
/usr/lib/python3/dist-packages/networkx/utils/heaps.py
/usr/lib/python3/dist-packages/networkx/utils/misc.py
/usr/lib/python3/dist-packages/networkx/utils/random_sequence.py
/usr/lib/python3/dist-packages/networkx/utils/rcm.py
/usr/lib/python3/dist-packages/networkx/utils/tests/
/usr/lib/python3/dist-packages/networkx/utils/tests/test_contextmanager.py
/usr/lib/python3/dist-packages/networkx/utils/tests/test_decorators.py
/usr/lib/python3/dist-packages/networkx/utils/tests/test_heaps.py
/usr/lib/python3/dist-packages/networkx/utils/tests/test_misc.py
/usr/lib/python3/dist-packages/networkx/utils/tests/test_random_sequence.py
/usr/lib/python3/dist-packages/networkx/utils/tests/test_rcm.py
/usr/lib/python3/dist-packages/networkx/utils/tests/test_unionfind.py
/usr/lib/python3/dist-packages/networkx/utils/union_find.py