反转networkx图中的一条边 [英] Reverse one edge in networkx graph

问题描述

我发现 DiGraph.reverse()可以反转有向图中所有边的方向，但是有没有办法只改变特定边的方向呢?

I found DiGraph.reverse() to reverse the direction of all edges in the directed graph, but is there a way to change the direction of a specific edge only?

推荐答案

当然可以手动完成，但是API中没有任何内容.

It can certainly be done manually, but there's nothing in the API for it.

$ cat edges.py; echo; python edges.py 
import networkx as nx
G=nx.DiGraph()
G.add_edge(1,2,{'weight':.5})
G.add_edge(3,4,{'weight':1.0})
attrs = G[1][2]
G.remove_edge(1,2)
G.add_edge(2,1,attrs)
print G.edges(data=True)

[(2, 1, {'weight': 0.5}), (3, 4, {'weight': 1.0})]
$ 

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