write_graph6

write_graph6(G, path, nodes=None, header=True)[source]

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

[1]Graph6 specification <http://users.cecs.anu.edu.au/~bdm/data/formats.html>