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


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 :


If the graph is directed or has parallel edges


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


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


>>> G = nx.Graph([(0, 1)])
>>> nx.generate_graph6(G)