def test_graphrenderer_check_malformed_graph_source_no_edge_start_or_end():
edge_source = ColumnDataSource()
edge_renderer = GlyphRenderer(data_source=edge_source, glyph=MultiLine())
renderer = GraphRenderer(edge_renderer=edge_renderer)
check = renderer._check_malformed_graph_source()
assert check != []
def test_graphrenderer_check_malformed_graph_source_no_edge_start_or_end():
edge_source = ColumnDataSource()
edge_renderer = GlyphRenderer(data_source=edge_source, glyph=MultiLine())
renderer = GraphRenderer(edge_renderer=edge_renderer)
check = renderer._check_malformed_graph_source()
assert check != []
def test_graphrenderer_check_malformed_graph_source_no_node_index():
node_source = ColumnDataSource()
node_renderer = GlyphRenderer(data_source=node_source, glyph=Circle())
renderer = GraphRenderer(node_renderer=node_renderer)
check = renderer._check_malformed_graph_source()
assert check != []
def test_graphrenderer_check_malformed_graph_source_no_node_index():
node_source = ColumnDataSource()
node_renderer = GlyphRenderer(data_source=node_source, glyph=Circle())
renderer = GraphRenderer(node_renderer=node_renderer)
check = renderer._check_malformed_graph_source()
assert check != []
def test_graphrenderer_init_props():
renderer = GraphRenderer()
assert renderer.x_range_name == "default"
assert renderer.y_range_name == "default"
assert renderer.node_renderer.data_source.data == dict(index=[])
assert renderer.edge_renderer.data_source.data == dict(start=[], end=[])
assert renderer.layout_provider is None
def test_graphrenderer_check_malformed_graph_source_no_errors():
renderer = GraphRenderer()
check = renderer._check_malformed_graph_source()
assert check == []
def test_graphrenderer_check_malformed_graph_source_no_errors():
renderer = GraphRenderer()
check = renderer._check_malformed_graph_source()
assert check == []
def get_graph_elems(graph):
'''
Convert the Networkx graph object into a graph that can be rendered by Bokeh. Creates node and edge
renderers for the graph, labels for the nodes and interactivity for clicking on nodes (displaying just
the node and all its linked edges).
'''
# get all nodes
node_ids = list(graph.nodes())
# get all edges including for each edge:
# -start and end nodes (the players in the player pair)-- kind of arbitrary since the graph is
# undirected
# -weight (the estimated net points for each player pair)
# -color (red if negative, black if positive)
start_ids = [a for a, b in graph.edges()]
end_ids = [b for a, b in graph.edges()]
weights = [.025 * graph[a][b]['weight'] for a, b in graph.edges()]
colors = [graph[a][b]['color'] for a, b in graph.edges()]
# define data sources for nodes and edges
graph_layout, label_layout = get_graph_layout(graph)
x_graph, y_graph = [v[0] for v in graph_layout.values()
], [v[1] for v in graph_layout.values()]
x_label, y_label = [v[0] for v in label_layout.values()
], [v[1] for v in label_layout.values()]
node_ds = ColumnDataSource(data=dict(index=list(graph.nodes()),
x=x_graph,
y=y_graph,
color=[Spectral4[0]] *
len(list(graph.nodes()))),
name="Node Renderer")
edge_ds = ColumnDataSource(data=dict(start=start_ids,
end=end_ids,
weight=weights,
color=colors),
name="Edge Renderer")
# create bokeh graph object
# note that both nodes and edges both have specified "glyphs" for regular and selection/nonselection (as well as
# the selection policy (NodesAndLinkedEdges())
# when a node is selected, its outgoing edges are highlighted
graph_plot = GraphRenderer(
node_renderer=GlyphRenderer(glyph=Circle(size=15, fill_color="color"),
selection_glyph=Circle(size=15,
fill_color="color"),
data_source=node_ds),
edge_renderer=GlyphRenderer(
glyph=MultiLine(line_alpha=0.3,
line_width='weight',
line_color='color'),
selection_glyph=MultiLine(line_alpha=1,
line_width='weight',
line_color='color'),
nonselection_glyph=MultiLine(line_alpha=0,
line_width='weight',
line_color='color'),
data_source=edge_ds),
layout_provider=StaticLayoutProvider(graph_layout=graph_layout),
selection_policy=NodesAndLinkedEdges())
# create labels for each node as well as their positions when plotted
label_ds = ColumnDataSource(
data=dict(index=list(graph.nodes()), x=x_label, y=y_label))
labels = LabelSet(x='x',
y='y',
text='index',
source=label_ds,
background_fill_color='lightgrey')
return graph_plot, labels
