AttributeError: 'DiGraph' object has no attribute 'number_of_selfloops'

Question

我正在尝试运行通过 jupyter notebook 在我的电脑中绘制图形代码。 Networkx、pygraphviz 和 nxpd 安装在我的 pc.But 我在运行ning

之后发现了 AttributeError

draw(G, layout='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 nx
import pygraphviz as pgv
from nxpd import draw, nxpdParams
nxpdParams['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

软件包 nxpd 似乎是几年前的最后一次更新。可以自行修改行（见https://github.com/chebee7i/nxpd/blob/master/nxpd/nx_pydot.py#L249），将G.number_of_selfloops换成nx.number_of_selfloops(G)。但是，我想他们是 nxpd 的更多问题，我建议简单地使用 networkx 自己的接口到 graphviz，参见例如graphviz_layout:

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

AttributeError: 'DiGraph' object has no attribute 'number_of_selfloops'

AttributeError: 'DiGraph' object has no attribute 'number_of_selfloops'

python

graph-theory

networkx

pygraphviz

jupyter-notebook