问题描述

我正在构建一个包含许多节点的图形，大约 3000 个.我编写了一个简单的 python 程序来使用 graphviz 来解决这个问题，但是它给了我分段错误，我不知道为什么，如果图形太大或如果我错过了什么.

I'm building a graph with many nodes, around 3000. I wrote a simple python program to do the trick with graphviz, but it gives me segmentation fault and I don't know why, if the graph is too big or if i'm missing something.

代码是:

#!/usr/bin/env python

# Import graphviz
import sys
sys.path.append('..')
sys.path.append('/usr/lib/graphviz')
import gv

# Import pygraph
from pygraph.classes.graph import graph
from pygraph.classes.digraph import digraph
from pygraph.algorithms.searching import breadth_first_search
from pygraph.readwrite.dot import write

# Graph creation
gr = graph()

file = open('nodes.dat', 'r')
line = file.readline()
while line:
        gr.add_nodes([line[0:-1]])
        line = file.readline()

file.close()
print 'nodes finished, beginning edges'

edges = open('edges_ok.dat', 'r')
edge = edges.readline()
while edge:
        gr.add_edge((edge.split()[0], edge.split()[1]))
        edge = edges.readline()

edges.close()
print 'edges finished'
print 'Drawing'

# Draw as PNG
dot = write(gr)
gvv = gv.readstring(dot)
gv.layout(gvv,'dot')
gv.render(gvv,'svg','graph.svg')

它在 gv.layout() 调用时崩溃.

这些文件类似于:节点:

The files are somthing like: nodes:

   node1
   node2
   node3

edges_ok:

   node1 node2
   node2 node3

推荐答案

我把布局类型从dot改成neato，问题就解决了.

I changed the layout type from dot to neato and that solved the problem.

我搜索了一下，似乎点布局在大图上有点错误.

I searched a bit and it seems that the dot layout is a bit faulty on large graphs.

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