def test_edges_between_different_nodes_should_be_arrows_in_both_ways(self):
        gr = graph()
        gr.add_nodes([0,1])
        gr.add_edge((0,1), label="label", attrs=[('key','value')])
        assert (0,1) in gr.edges()
        assert (1,0) in gr.edges()
        assert len(gr.edges()) == 2
        assert gr.neighbors(0) == [1]
        assert gr.neighbors(1) == [0]
        assert gr.edge_properties.keys() in (0,1)
        assert (1,0) in gr.edge_properties.keys()
        assert (0,1) in gr.edge_attr.keys()
        assert (1,0) in gr.edge_attr.keys()
dataset/ETHPy150Open pmatiello/python-graph/tests/unittests-graph.py/test_graph.test_edges_between_different_nodes_should_be_arrows_in_both_ways/swapped operands of `in`