How to set NetworkX edge labels offset? (to avoid label overlap)

问题:

I am trying to add edge labels for a graph. It all works well, only problem is when the two edges intersect - I only see one of the labels as they happen to overlap.

As you can see the hphob-alpha label is shown but the polarity-beta label is not shown (my guess is that it is right under the previously mentioned).

I could not find any documentation on how to re-position the labels, any advice how to set some kind of offset to move the labels?

Code used to generate the graph:

try:     import matplotlib.pyplot as plt except:     raise  import networkx as nx  G=nx.Graph()  a="hphob" b="polarity" c="alpha" d="beta" G.add_edge(a,b,weight=0.5) G.add_edge(b,c,weight=0.5) G.add_edge(c,d,weight=0.5) G.add_edge(a,d,weight=0.5) G.add_edge(a,c,weight=0.5) G.add_edge(b,d,weight=0.5)  pos=nx.spring_layout(G) # positions for all nodes  # nodes nx.draw_networkx_nodes(G,pos,node_size=7000, node_color="white")  # edges nx.draw_networkx_edges(G,pos,         width=6,alpha=0.5,edge_color='black')   # labels nx.draw_networkx_labels(G,pos,font_size=20,font_family='sans-serif')  nx.draw_networkx_edge_labels(G,pos,      {         (a,b):"x", (b,c):"y", (c,d):"w", (a,d):"z", (a,c):"v", (b,d):"r"     } )  plt.axis('off') plt.savefig("weighted_graph.png") # save as png plt.show() # display 

回答1:

I use version 1.6 of NetworkX, and there I can submit label_pos to draw_networkx_edge_labels(). By default, this is set to 0.5, but using your example and setting it to 0.3, I get the following result:

nx.draw_networkx_edge_labels(G,pos,      {         (a,b):"x", (b,c):"y", (c,d):"w", (a,d):"z", (a,c):"v", (b,d):"r"     },     label_pos=0.3 ) 

Here are the details

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