medium2_1.py

import ipycytoscape
import json
import ipywidgets
# I paste here allthe data in order to allow you to copy and paste it without loading data from files.
railnet= '''{
    "nodes": [
        {"data": { "id": "BER", "label":"HBf BER", "classes":"east"}},
        {"data": { "id": "MUN", "label":"HBf MUN", "classes":"west"}},
        {"data": { "id": "FRA", "label":"HBf FRA", "classes":"west"}},
        {"data": { "id": "HAM", "label":"HBf HAM", "classes":"west"}},
        {"data": { "id": "LEP", "label":"HBf LEP", "classes":"east"}}
        ],
    "edges": [
        {"data": { "id": "line1", "source": "BER", "target": "MUN","label":"200km/h"}},
        {"data": { "id": "line2", "source": "MUN", "target": "FRA","label":"200km/h"}},
        {"data": { "id": "line3", "source": "FRA", "target": "BER","label":"250km/h" }},
        {"data": { "id": "line4", "source": "BER", "target": "HAM","label":"300km/h" }},
        {"data": { "id": "line5", "source": "BER", "target": "LEP","label":"300km/h" }}
        
    ]
  }'''

train_style = [
    {'selector': 'node','style': {
        'font-family': 'arial',
        'font-size': '10px',
        'label': 'data(label)',}},
    
    {'selector': 'node[classes="east"]','style': {
        'background-color': 'yellow'}},
    
     {'selector': 'node[classes="west"]','style': {
        'background-color': 'blue'}},
    
    
    {'selector': 'node[id = "BER"]','style': {
        'font-family': 'arial',
        'font-size': '10px',
        'label': 'data(label)',
        'background-color': 'green'}},
    
    {'selector': 'edge[id = "line1"]','style': {
        'font-family': 'arial',
        'font-size': '10px',
        'label': 'data(label)'}},
    
    {'selector': 'edge[id = "line2"]','style': {
        'font-family': 'arial',
        'font-size': '10px',
        'label': 'data(label)'}},
    
    {'selector': 'edge[id = "line3"]','style': {
        'font-family': 'arial',
        'font-size': '10px',
        'label': 'data(label)'}},
    
    {'selector': 'edge[id = "line4"]','style': {
        'font-family': 'arial',
        'font-size': '10px',
        'label': 'data(label)'}},
    
    {'selector': 'edge[id = "line5"]','style': {
        'font-family': 'arial',
        'font-size': '10px',
        'label': 'data(label)'}}
    
    ]
railnetJSON = json.loads(railnet)
ipycytoscape_obj = ipycytoscape.CytoscapeWidget()
ipycytoscape_obj.graph.add_graph_from_json(railnetJSON) 
ipycytoscape_obj.set_style(train_style)
ipycytoscape_obj