property map values are not loaded for .graphml graph

graph-tool
1

Hi,

I have saved a graph in Networkx with .graphml format. I can successfully load the graph in graph-tool and I can see the edge property attached to graph. However, when I try to access the values I get an error that the property does not exist.

G = gt.load_graph('gdrive/MyDrive/ColabNotebooks/Thesis/sources/k4p3-2-test.graphml')
G.properties

{('e',
  '_graphml_edge_id'): <EdgePropertyMap object with value type 'string', for Graph 0x7f0347bd2950, at 0x7f0347d2a4d0>,
('e',
  'etype'): <EdgePropertyMap object with value type 'int32_t', for Graph 0x7f0347bd2950, at 0x7f0347d2af50>,
('v',
  '_graphml_vertex_id'): <VertexPropertyMap object with value type 'string', for Graph 0x7f0347bd2950, at 0x7f0347d2aa50>}

e = G.edges().next()
etype[e]
NameError: name 'etype' is not defined

2

You seem unfamiliar with the Python syntax. In Python, objects need to
be declared before they are used.

The correct way to obtain the property map would have been:

   etype = G.ep["etype"]
   etype[e]