Warning

This documents an unmaintained version of NetworkX. Please upgrade to a maintained version and see the current NetworkX documentation.

write_graph6

write_graph6(G, path, nodes=None, header=True)

Write a simple undirected graph to path in graph6 format.

Parameters:

• G (Graph (undirected)) –
• path (file or string) – File or filename to write.
• nodes (list or iterable) – Nodes are labeled 0…n-1 in the order provided. If None the ordering given by G.nodes() is used.
• header (bool) – If True add ‘>>graph6<<’ string to head of data

Raises:

NetworkXError – If the graph is directed or has parallel edges

Examples

>>> G = nx.Graph([(0, 1)])
>>> nx.write_graph6(G, 'test.g6')

See also

generate_graph6(), parse_graph6(), read_graph6()

Notes

The format does not support edge or node labels, parallel edges or self loops. If self loops are present they are silently ignored.

References

Graph6 specification: http://cs.anu.edu.au/~bdm/data/formats.txt for details.