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


adjacency_data(G, attrs={'id': 'id', 'key': 'key'})[source]

Return data in adjacency format that is suitable for JSON serialization and use in Javascript documents.


G : NetworkX graph

attrs : dict

A dictionary that contains two keys ‘id’ 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', key='key').

If some user-defined graph data use these attribute names as data keys, they may be silently dropped.


data : dict

A dictionary with adjacency formatted data.



If values in attrs are not unique.


Graph, node, and link attributes will be written when using this format but attribute keys must be strings if you want to serialize the resulting data with JSON.

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


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

To serialize with json

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