Warning

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

generate_graph6

generate_graph6(G, nodes=None, header=True)[source]

Generate graph6 format string from a simple undirected graph.

Parameters :

G : Graph (undirected)

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

Returns :

s : string

String in graph6 format

Raises :

NetworkXError

If the graph is directed or has parallel edges

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.

Examples

>>> G = nx.Graph([(0, 1)])
>>> nx.generate_graph6(G)
'>>graph6<<A_'