/usr/lib/python2.7/dist-packages/pygraphviz/tests/ is in python-pygraphviz 1.3.1-0ubuntu2.
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/usr/lib/python2.7/dist-packages/pygraphviz/tests/__init__.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_attribute_defaults.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_attributes.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_clear.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_drawing.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_edge_attributes.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_graph.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_html.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_layout.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_node_attributes.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_readwrite.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_string.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_subgraph.py
/usr/lib/python2.7/dist-packages/pygraphviz/tests/test_unicode.py