如何在Networkx/Graphviz中绘制平行边 [英] How to draw parallel edges in Networkx / Graphviz
本文介绍了如何在Networkx/Graphviz中绘制平行边的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试使用NetworkX在两个节点之间添加平行边,但是由于以下错误而失败.我在做什么错了?
I am trying to add parallel edges between two nodes using NetworkX but it fails with the below error. What am I doing wrong?
import networkx as nx
import graphviz
g1 = nx.MultiGraph()
node1 = 'a'
node2 = 'b'
g1.add_edge(node1,node2,key='one')
g1.add_edge(node1,node2,key='two')
A = nx.to_agraph(g1)
A.add_subgraph()
A.draw('test2.png', prog='dot')
错误:
Traceback (most recent call last):
File "test2.py", line 12, in <module>
A = nx.to_agraph(g1)
File "C:\python27\lib\site-packages\networkx-1.11rc1-py2.7.egg\networkx\drawing\nx_agraph.py", line 152, in to_agraph
A.add_edge(u,v,key=str(key),**str_edgedata)
File "C:\python27\lib\site-packages\pygraphviz\agraph.py", line 481, in add_edge
eh = gv.agedge(self.handle, uh, vh, key, _Action.find)
KeyError: 'agedge: no key'
推荐答案
您可以在不使用graphviz的情况下执行相同的操作.我将 connectionstyle 添加到nx.draw中:
You can do the same without using graphviz. I do it adding connectionstyle to nx.draw:
import networkx as nx
g1 = nx.DiGraph(directed=True)
node1 = 'a'
node2 = 'b'
g1.add_edge(node1,node2,key=1)
g1.add_edge(node2,node1,key=2)
nx.draw(g1, with_labels=True, arrows = True, connectionstyle='arc3, rad = 0.1')
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