Warning

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

read_gml

read_gml(path, label='label', destringizer=None)[source]

Read graph in GML format from path.

Parameters:
  • path (filename or filehandle) – The filename or filehandle to read from.
  • label (string, optional) – If not None, the parsed nodes will be renamed according to node attributes indicated by label. Default value: 'label'.
  • destringizer (callable, optional) – A destringizer that recovers values stored as strings in GML. If it cannot convert a string to a value, a ValueError is raised. Default value : None.
Returns:

G – The parsed graph.
Return type:

NetworkX graph
Raises:

NetworkXError – If the input cannot be parsed.

See also

write_gml(), parse_gml()

Notes

The GML specification says that files should be ASCII encoded, with any extended ASCII characters (iso8859-1) appearing as HTML character entities.

References

GML specification: http://www.infosun.fim.uni-passau.de/Graphlet/GML/gml-tr.html

Examples

>>> G = nx.path_graph(4)
>>> nx.write_gml(G, 'test.gml')
>>> H = nx.read_gml('test.gml')