no attribute 'graphviz_layout' error

[gangcai]

Traceback (most recent call last):
  File "/home/user/bin/GraphEmbed/graph_embed.py", line 405, in <module>
    main(args)
  File "/home/user/bin/GraphEmbed/graph_embed.py", line 354, in main
    data_matrix_2d = ge.transform(data_matrix=data_matrix, target=y)
  File "/home/user/bin/GraphEmbed/graph_layout_embedder.py", line 113, in transform
    random_state=self.random_state)
  File "/home/user/bin/miniconda2/lib/python2.7/site-packages/toolz/functoolz.py", line 440, in memof
    cache[k] = result = func(*args, **kwargs)
  File "/home/user/bin/GraphEmbed/graph_layout_embedder.py", line 323, in annotate_graph_with_graphviz_layout
    layout_pos = nx.graphviz_layout(graph)
AttributeError: 'module' object has no attribute 'graphviz_layout'