pydot_layout#

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

Create node positions using pydot and Graphviz.

Parameters:

GGraph: NetworkX graph to be laid out.
progstring (default: ‘neato’): Name of the GraphViz command to use for layout. Options depend on GraphViz version but may include: ‘dot’, ‘twopi’, ‘fdp’, ‘sfdp’, ‘circo’
rootNode from G or None (default: None): The node of G from which to start some layout algorithms.

Returns:

dict: Dictionary of positions keyed by node.

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()}

Examples

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