networkx.drawing.nx_pydot.pydot_layout

pydot_layout(G, prog='neato', root=None)[source]

Create node positions using pydot and Graphviz.

Parameters

  • G (Graph) – NetworkX graph to be laid out.

  • prog (string (default: ‘neato’)) – Name of the GraphViz command to use for layout. Options depend on GraphViz version but may include: ‘dot’, ‘twopi’, ‘fdp’, ‘sfdp’, ‘circo’

  • root (Node from G or None (default: None)) – The node of G from which to start some layout algorithms.

Returns

Dictionary of positions keyed by node.

Return type

dict

Examples

>>> G = nx.complete_graph(4)
>>> pos = nx.nx_pydot.pydot_layout(G)
>>> pos = nx.nx_pydot.pydot_layout(G, prog="dot")

Notes

If you use complex node objects, they may have the same string representation and GraphViz could treat them as the same node. The layout may assign both nodes a single location. See Issue #1568 If this occurs in your case, consider relabeling the nodes just for the layout computation using something similar to:

H = nx.convert_node_labels_to_integers(G, label_attribute=’node_label’) H_layout = nx.nx_pydot.pydot_layout(G, prog=’dot’) G_layout = {H.nodes[n][‘node_label’]: p for n, p in H_layout.items()}