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


generate_sparse6(G, nodes=None, header=True)[source]

Generate sparse6 format string from an 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 ‘>>sparse6<<’ string to head of data

Returns :

s : string

String in sparse6 format

Raises :


If the graph is directed


The format does not support edge or node labels. References ———- Sparse6 specification: http://cs.anu.edu.au/~bdm/data/formats.txt for details.


>>> G = nx.MultiGraph([(0, 1), (0, 1), (0, 1)])
>>> nx.generate_sparse6(G)