Add edge-weights to plot output in networkx

Question

I am doing some graph theory in python using the networkx package. I would like to add the weights of the edges of my graph to the plot output. How can I do this?

For example How would I modify the following code to get the desired output?

import networkx as nx import matplotlib.pyplot as plt  G=nx.Graph() i=1 G.add_node(i,pos=(i,i)) G.add_node(2,pos=(2,2)) G.add_node(3,pos=(1,0)) G.add_edge(1,2,weight=0.5) G.add_edge(1,3,weight=9.8) pos=nx.get_node_attributes(G,'pos') nx.draw(G,pos) plt.savefig("path.png") 

I would like 0.5 and 9.8 to appear on the edges to which they refer in the graph.

Answer 1

You'll have to call nx.draw_networkx_edge_labels(), which will allow you to... draw networkX edge labels :)

EDIT: full modified source

#!/usr/bin/python import networkx as nx import matplotlib.pyplot as plt  G=nx.Graph() i=1 G.add_node(i,pos=(i,i)) G.add_node(2,pos=(2,2)) G.add_node(3,pos=(1,0)) G.add_edge(1,2,weight=0.5) G.add_edge(1,3,weight=9.8) pos=nx.get_node_attributes(G,'pos') nx.draw(G,pos) labels = nx.get_edge_attributes(G,'weight') nx.draw_networkx_edge_labels(G,pos,edge_labels=labels) plt.savefig(<wherever>)