Hi, is there a way to get the key 'id' of edges in the spirit of the vertices one like the following? _vertexIds works but not _edgeIds.

g=load_graph(dataFolder+'networkFullyConnected.xml')
_vertexIds = g.vertex_properties["_graphml_vertex_id"]
_edgeIds = g.edge_properties["_graphml_edge_id"]

The result is
Traceback (most recent call last):
  File "edgesProperties.py", line 18, in <module>
    _edgeIds = g.edge_properties["_graphml_edge_id"]
  File "/usr/lib/python2.7/site-packages/graph_tool/__init__.py", line 995, in __getitem__
    val = self.get_func(self.g, key)
  File "/usr/lib/python2.7/site-packages/graph_tool/__init__.py", line 1469, in <lambda>
    lambda g, k: g.__properties[("e", k)],
KeyError: ('e', '_graphml_edge_id')

And the network in graphml framework reads as
<edge id="1" source="65091" target="65221">
<data key="w">192.49624317</data>
</edge>
<node id="16071">
<data key="o">5.41539461304e-05</data>
<data key="d">2.03027821579e-05</data>
</node>


Thanks,
F.