1

我非常肤浅地使用networkx。将图形写入文件很容易,例如 graphml,但是如何在不打扰文件系统的情况下将其保存到字符串中呢?

它的文档说这是可能的。

4

2 回答 2

8

大多数格式也有一个“生成器”。所以你可以在不使用 StringIO 的情况下这样做:

In [1]: import networkx as nx

In [2]: G=nx.path_graph(4)

In [3]: s='\n'.join(nx.generate_graphml(G))

In [4]: print s
<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">
  <key attr.name="name" attr.type="string" for="graph" id="d0" />
  <graph edgedefault="undirected">
    <data key="d0">path_graph(4)</data>
    <node id="0" />
    <node id="1" />
    <node id="2" />
    <node id="3" />
    <edge source="0" target="1" />
    <edge source="1" target="2" />
    <edge source="2" target="3" />
  </graph>
</graphml>
于 2012-06-15T19:28:07.120 回答
5

正如 larsmans 评论的那样,可以使用StringIO

import networkx as nx
import StringIO
import itertools

g = nx.Graph()

edges = itertools.combinations([1,2,3,4], 2)
g.add_edges_from(edges)

# File-like object
output = StringIO.StringIO()

nx.write_graphml(g, output)

# And here's your string
gstr = output.getvalue()
print gstr
output.close()
于 2012-06-15T12:10:20.720 回答