Plotting of graph only possible when edges are present.

[sorenwacker]

I noticed I get an error message when the line defining the edge is commented out. It can be plotted using networkx.draw() though.

import holoviews as hv
import networkx as nx
hv.extension('bokeh')

G = nx.Graph()
G.add_nodes_from([1, 2, 3])
# G.add_weighted_edges_from( [(1,2,0)] ) 

%opts Graph [width=400 height=400]
padding = dict(x=(-10, 10), y=(-10, 10))
hv.Graph.from_networkx(G, nx.layout.circular_layout).redim.range(**padding)

>>> DataError: Following columns specified as dimensions but not found in data: ['start', 'end']