node_link_data¶

node_link_data(G, attrs={'source': 'source', 'target': 'target', 'key': 'key', 'id': 'id'})[source]¶

Return data in node-link format that is suitable for JSON serialization and use in Javascript documents.

Parameters:	G : NetworkX graph attrs : dict A dictionary that contains four keys ‘id’, ‘source’, ‘target’ and ‘key’. The corresponding values provide the attribute names for storing NetworkX-internal graph data. The values should be unique. Default value: dict(id='id', source='source', target='target', key='key'). If some user-defined graph data use these attribute names as data keys, they may be silently dropped.
Returns:	data : dict A dictionary with node-link formatted data.
Raises:	NetworkXError If values in attrs are not unique.

See also

node_link_graph, adjacency_data, tree_data

Notes

Graph, node, and link attributes are stored in this format but keys for attributes must be strings if you want to serialize with JSON.

The default value of attrs will be changed in a future release of NetworkX.

Examples

>>> from networkx.readwrite import json_graph
>>> G = nx.Graph([(1,2)])
>>> data = json_graph.node_link_data(G)

To serialize with json

>>> import json
>>> s = json.dumps(data)