“DiGraph”对象没有属性“number_of_selfloops”

Question

我正在尝试通过 jupyter 笔记本在我的电脑上运行图形绘制代码。我的电脑上安装了 Networkx 、pygraphviz 和 nxpd 。但运行后发现 AttributeError绘制（G，布局='circo'）我该如何解决这个问题？错误在下面的描述中：AttributeError                            Traceback (most recent call last)<ipython-input-2-d4524714330e> in <module>----> 1 draw(G, layout='circo')~/anaconda3/lib/python3.7/site-packages/nxpd/nx_pydot.py in draw_pydot(G, filename, format, prefix, suffix, layout, args, show)    455     456     # Draw the image.--> 457     G2 = to_pydot(G)    458     G2.write(fobj, prog=prog, format=ext)    459     if close:~/anaconda3/lib/python3.7/site-packages/nxpd/nx_pydot.py in to_pydot(G, raise_exceptions)    247         graph_type = 'graph'    248 --> 249     strict = G.number_of_selfloops() == 0 and not G.is_multigraph()    250     251     # Create the Pydot graph.AttributeError: 'DiGraph' object has no attribute 'number_of_selfloops'代码如下：import networkx as nximport pygraphviz as pgvfrom nxpd import draw, nxpdParamsnxpdParams['show'] = 'ipynb'G = nx.DiGraph()G.add_edge("a", "b")G.add_edge("b", "c")G.add_edge("c", "d")G.add_edge("d", "e")G.add_edge("e", "c")G.add_edge("a", "d")draw(G, layout='circo')

Answer 1

该软件包nxpd似乎是几年前最后一次更新的。您可以自己修改该行（参见https://github.com/chebee7i/nxpd/blob/master/nxpd/nx_pydot.py#L249）并G.number_of_selfloops与nx.number_of_selfloops(G). 然而，我想他们有更多的问题nxpd，我建议简单地使用networkx自己的接口graphviz，参见例如graphviz_layout：

pos = nx.nx_agraph.graphviz_layout(G, prog="circo")
nx.draw(G, pos)