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"""Example of writing JSON format graph data and using the D3 Javascript library to produce an HTML/Javascript drawing.
"""
# Copyright (C) 2011-2012 by
# Aric Hagberg <hagberg@lanl.gov>
# Dan Schult <dschult@colgate.edu>
# Pieter Swart <swart@lanl.gov>
# All rights reserved.
# BSD license.
__author__ = """Aric Hagberg <aric.hagberg@gmail.com>"""
import json
import networkx as nx
from networkx.readwrite import json_graph
import http_server
G = nx.barbell_graph(6,3)
# this d3 example uses the name attribute for the mouse-hover value,
# so add a name to each node
for n in G:
G.node[n]['name'] = n
# write json formatted data
d = json_graph.node_link_data(G) # node-link format to serialize
# write json
json.dump(d, open('force/force.json','w'))
print('Wrote node-link JSON data to force/force.json')
# open URL in running web browser
http_server.load_url('force/force.html')
print('Or copy all files in force/ to webserver and load force/force.html')
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