GraphML extracted from Maltego Casefile

gistfile1.txt

kmaxwell@godel:~/Desktop/maltego-test/Graphs$ python
Python 2.7.3 (default, Aug  1 2012, 05:14:39) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import igraph
>>> testgraph = Graph.Read_GraphML("Graph1.graphml")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'Graph' is not defined
>>> testgraph = igraph.Graph.Read_GraphML("Graph1.graphml")
python: igraph_strvector.c:467: igraph_strvector_size: Assertion `sv->data != 0' failed.
Aborted (core dumped)

Graph1.graphml

<?xml version="1.1" encoding="UTF-8" standalone="no"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:y="http://www.yworks.com/xml/graphml" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://www.yworks.com/xml/schema/graphml/1.1/ygraphml.xsd">
  <VersionInfo createdBy="Maltego CaseFile Community" subtitle="" version="1.0.1.2483"/>
  <key for="graphml" id="d0" yfiles.type="resources"/>
  <key for="port" id="d1" yfiles.type="portgraphics"/>
  <key for="port" id="d2" yfiles.type="portgeometry"/>
  <key for="port" id="d3" yfiles.type="portuserdata"/>
  <key attr.name="MaltegoEntity" for="node" id="d4"/>
  <key for="node" id="d5" yfiles.type="nodegraphics"/>
  <key attr.name="MaltegoLink" for="edge" id="d6"/>
  <key for="edge" id="d7" yfiles.type="edgegraphics"/>
  <graph edgedefault="directed" id="G">
    <node id="n0">
      <data key="d4">
        <mtg:MaltegoEntity xmlns:mtg="http://maltego.paterva.com/xml/mtgx" type="maltego.DesktopComputer">
          <mtg:Properties>
            <mtg:Property displayName="Device" hidden="false" name="device" nullable="true" readonly="false" type="string">
              <mtg:Value>PC</mtg:Value>
            </mtg:Property>
          </mtg:Properties>
        </mtg:MaltegoEntity>
      </data>
      <data key="d5">
        <mtg:EntityRenderer xmlns:mtg="http://maltego.paterva.com/xml/mtgx">
          <mtg:Position x="270.0" y="160.0"/>
        </mtg:EntityRenderer>
      </data>
    </node>
    <node id="n1">
      <data key="d4">
        <mtg:MaltegoEntity xmlns:mtg="http://maltego.paterva.com/xml/mtgx" type="maltego.Smartphone">
          <mtg:Properties>
            <mtg:Property displayName="Device" hidden="false" name="device" nullable="true" readonly="false" type="string">
              <mtg:Value>HTC</mtg:Value>
            </mtg:Property>
          </mtg:Properties>
        </mtg:MaltegoEntity>
      </data>
      <data key="d5">
        <mtg:EntityRenderer xmlns:mtg="http://maltego.paterva.com/xml/mtgx">
          <mtg:Position x="512.0" y="216.0"/>
        </mtg:EntityRenderer>
      </data>
    </node>
    <edge id="e0" source="n1" target="n0">
      <data key="d6">
        <mtg:MaltegoLink xmlns:mtg="http://maltego.paterva.com/xml/mtgx" type="maltego.link.manual-link">
          <mtg:Properties>
            <mtg:Property displayName="Show Label" hidden="false" name="maltego.link.show-label" nullable="true" readonly="false" type="int">
              <mtg:Value>0</mtg:Value>
            </mtg:Property>
            <mtg:Property displayName="Thickness" hidden="false" name="maltego.link.thickness" nullable="true" readonly="false" type="int">
              <mtg:Value>2</mtg:Value>
            </mtg:Property>
            <mtg:Property displayName="Label" hidden="false" name="maltego.link.manual.type" nullable="true" readonly="false" type="string">
              <mtg:Value>Test link</mtg:Value>
            </mtg:Property>
            <mtg:Property displayName="Style" hidden="false" name="maltego.link.style" nullable="true" readonly="false" type="int">
              <mtg:Value>0</mtg:Value>
            </mtg:Property>
            <mtg:Property displayName="Description" hidden="false" name="maltego.link.manual.description" nullable="true" readonly="false" type="string">
              <mtg:Value/>
            </mtg:Property>
            <mtg:Property displayName="Color" hidden="false" name="maltego.link.color" nullable="true" readonly="false" type="color">
              <mtg:Value>-8421505</mtg:Value>
            </mtg:Property>
          </mtg:Properties>
        </mtg:MaltegoLink>
      </data>
      <data key="d7">
        <mtg:LinkRenderer xmlns:mtg="http://maltego.paterva.com/xml/mtgx"/>
      </data>
    </edge>
  </graph>
  <data key="d0">
    <y:Resources/>
  </data>
</graphml>

Did you found the solution to this problem ?