def degree(plot_type=None, network=None):
if not plot_type:
abort(404)
if plot_type not in ['scatter', 'powerlaw']:
abort(404)
if not network_test(network):
abort(404)
gr = utils.get_graph(session, key=network)
data = Counter(nx.degree(gr.graph).values())
if plot_type == 'scatter':
data = [
{"x": int(k), "y": int(v)}
for k, v in data.iteritems()
]
return jsonify(scatter_points=data)
elif plot_type == 'powerlaw':
x, y = data.keys(), data.values()
x = np.array(x)
y = np.log(np.array(y))
grad, inter = np.polyfit(np.log(x), y, 1)
y = inter + (grad * np.log(x))
data = [
{"x": datum[0], "y": np.exp(datum[1])}
for datum in zip(x, y)
if not np.isnan(np.exp(datum[1]))
]
return jsonify(bestfit=data)
def flights(departure_code=None, destination_code=None):
gr = utils.get_graph(session)
airports = gr.get_current_nodes.keys()
if departure_code and departure_code not in airports:
abort(404)
if destination_code and destination_code not in airports:
abort(404)
if departure_code and destination_code:
# get shortest paths
shortest_paths = []
try:
paths = nx.all_shortest_paths(
gr.graph,
departure_code,
destination_code
)
except:
paths = []
for path in paths:
# path is [a,b,c] and need [a, b] [
shortest_paths.extend(
[
{
'origin': path[i],
'destination': path[i+1],
'count': 1000
}
for i, _ in enumerate(path[:-1])
]
)
return jsonify(flight_data=shortest_paths)
elif departure_code:
# get next stop
neighbors = nx.neighbors(gr.graph, departure_code)
neighbors = [
{
'origin': departure_code,
'destination': dst,
'count': 20
}
for dst in neighbors
]
return jsonify(flight_data=neighbors)
else:
data = []
# get all flights
edges = gr.graph.edges(data=True)
for edge in edges:
data.append({
'origin': edge[0],
'destination': edge[1],
'count': edge[2]['weight']
})
return jsonify(flight_data=data)
def london_map(line=None):
gr = utils.get_graph(session, key='underground')
lines = gr.get_current_lines
if line and line not in lines:
abort(404)
return jsonify(
**vega.LondonMap().get_json(**{'line': line})
)
def airports(airport_code=None):
""" get information on an airport or return all airports
"""
gr = utils.get_graph(session)
if request.method == 'GET':
if airport_code:
data = gr.get_current_nodes.get(airport_code) or None
if data:
data['degree'] = nx.degree_centrality(
gr.graph
)[airport_code]
# eigenvector centrality sometimes won't converge
try:
eigens = nx.eigenvector_centrality(
gr.graph
)[airport_code]
except:
eigens = 0
data['eigenvector'] = eigens
return jsonify(**data)
else:
abort(404)
else:
return jsonify(airport_data=gr.get_current_nodes.values())
elif request.method == 'DELETE':
if airport_code:
try:
gr.graph.remove_node(airport_code)
return Response("Deleted", status=200)
except nx.NetworkXError:
pass
return Response("Nothing to delete", status=204)
elif request.method == 'POST':
# using this to refresh the graph
if 'network' in session:
session.pop('network', None)
gr = utils.get_graph(session)
return Response("Restored", status=200)
def forcedlayout(network=None):
if not network:
abort(404)
params = request.args.get('params')
if not params:
params = []
else:
params = urlparse.parse_qs(params)['params'][0].split(',')
gr = utils.get_graph(session, key=network)
edges, nodes = gr.d3_forced_layout(params)
return jsonify(nodes=nodes, edges=edges)
def london():
gr = utils.get_graph(session, key='underground')
_, v = gr.vulnerability(limit=5)
forced_list = ','.join(['line'])
return render_template(
'london.html',
stations=gr.get_current_nodes,
lines=gr.get_current_lines,
degrees=utils.sort_degrees(
nx.degree_centrality(gr.graph), limit=5
),
vulnerability=v,
force=urllib.urlencode({'params': forced_list})
)
def lines(line=None):
gr = utils.get_graph(session, key='underground')
data = []
edges = gr.graph.edges(data=True)
for edge in edges:
if not line or line in edge[2]['line']:
data.append({
'source': edge[0],
'target': edge[1],
'line': edge[2]['line']
})
try:
data = jsonify(lines=data)
except:
abort(404)
return data
def index():
gr = utils.get_graph(session)
_, v = gr.vulnerability(limit=5)
degrees = utils.sort_degrees(
nx.degree_centrality(gr.graph), limit=5
)
try:
eigens = utils.sort_degrees(
nx.eigenvector_centrality(gr.graph), limit=5
)
except:
eigens = {}
return render_template(
'home.html',
airports=gr.get_current_nodes,
degrees=degrees,
eigens=eigens,
vulnerability=v
)
def random():
gr = utils.get_graph(session, key='random')
_, v = gr.vulnerability(limit=5)
degrees = utils.sort_degrees(
nx.degree_centrality(gr.graph), limit=5
)
try:
eigens = utils.sort_degrees(
nx.eigenvector_centrality(gr.graph), limit=5
)
except:
eigens = {}
return render_template(
'random.html',
nodes=gr.graph.edges(),
degrees=degrees,
eigens=eigens,
vulnerability=v,
)
def route():
gr = utils.get_graph(session)
return render_template(
'route.html',
airports=gr.get_current_nodes,
)
def stations():
gr = utils.get_graph(session, key='underground')
return jsonify(stations=gr.get_current_nodes)
