def test_undirected_edge_get(self):
""" Get an attribute of an undirected edge """
v0 = UndirectedVertex(val='v0')
v1 = UndirectedVertex(val='v1')
e01 = UndirectedEdge((v0, v1), attrs={'weight': 5})
self.assertEqual(e01.get('weight'), 5)
self.assertIsNone(e01.get('notthere'))
