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| import json
import dash
import dash_cytoscape as cyto
import dash_html_components as html
import dash_core_components as dcc
from dash.dependencies import Input, Output
app = dash.Dash(__name__)
nodes = [
{'data': {'id': short, 'label': label} }
for short, label in (
('la', 'Los Angeles'), ('nyc', 'New York'), ('to', 'Toronto'),
('mtl', 'Montreal'), ('van', 'Vancouver'), ('chi', 'Chicago'),
('bos', 'Boston'), ('hou', 'Houston')
)
]
edges = [
{'data': {'source': source, 'target': target}}
for source, target in (
('van', 'la'), ('la', 'chi'), ('hou', 'chi'),
('to', 'mtl'), ('mtl', 'bos'), ('nyc', 'bos'),
('to', 'hou'), ('to', 'nyc'), ('la', 'nyc'),
('nyc', 'bos')
)
]
app.layout = html.Div([
cyto.Cytoscape(
id='cytoscape-event',
layout={'name': 'circle'},
elements=edges+nodes,
style={'width': '100%', 'height': '450px'}
),
html.Pre(id='show_json')
])
@app.callback(Output('show_json', 'children'),
Input('cytoscape-event', 'mouseoverEdgeData'))
def displayData(data):
return json.dumps(data, indent=2)
if __name__ == '__main__':
app.run_server(debug=True)
|
