我正在使用 Jupyter Notebook 进行图形分析。我需要使用 Networkx 生成 MultiDiGraph,我需要将其绘制成一棵树状图,但是出现了错误:
from networkx.drawing.nx_agraph import write_dot, graphviz_layout
write_dot(G,'test.dot')
plt.title('draw_networkx')
pos =graphviz_layout(G, prog='dot')
nx.draw(G, pos, with_labels=False, arrows=True)
ModuleNotFoundError Traceback (most recent call last)
D:\Programmes\Anaconda3\lib\site-packages\networkx\drawing\nx_agraph.py in to_agraph(N)
131 try:
--> 132 import pygraphviz
133 except ImportError as e:
ModuleNotFoundError: No module named 'pygraphviz'
The above exception was the direct cause of the following exception:
ImportError Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_33384/3939344011.py in <module>
----> 1 write_dot(G,'test.dot')
2 plt.title('draw_networkx')
3 pos =graphviz_layout(G, prog='dot')
4 nx.draw(G, pos, with_labels=False, arrows=True)
D:\Programmes\Anaconda3\lib\site-packages\networkx\drawing\nx_agraph.py in write_dot(G, path)
183 Filename or file handle to write
184 """
--> 185 A = to_agraph(G)
186 A.write(path)
187 A.clear()
D:\Programmes\Anaconda3\lib\site-packages\networkx\drawing\nx_agraph.py in to_agraph(N)
132 import pygraphviz
133 except ImportError as e:
--> 134 raise ImportError("requires pygraphviz " "http://pygraphviz.github.io/") from e
135 directed = N.is_directed()
136 strict = nx.number_of_selfloops(N) == 0 and not N.is_multigraph()
ImportError: requires pygraphviz http://pygraphviz.github.io/
我按照这个问题中的指示进行操作,但仍旧遇到同样的错误。
也许我需要采取其他措施来将Pygraphviz
添加到我的Anaconda环境中,以便我可以使用 networkx pygraphviz layouts
。
请问有关此项操作的正确方法吗?
我已经安装了Graphviz 2.5二进制文件,并在环境变量Path中填入bin路径,所以现在我能够运行上述问题中展示的示例代码。
但是我感兴趣的代码需要Pygraphviz
,所以我觉得我正在迈向掌握网络的第一步。