On Feb 27, 2006, at 2:33 PM, David E. Konerding wrote:
Here's what I see: new v1= <boost.graph._graph.Vertex object at 0x40168a04> new v2= <boost.graph._graph.Vertex object at 0x40168aac> new edge= <boost.graph._graph.Edge object at 0x40164dec> vertex: <boost.graph._graph.Vertex object at 0x40168ae4> vertex: <boost.graph._graph.Vertex object at 0x40168b54> edge: <boost.graph._graph.Edge object at 0x40164d6c> edge source: <boost.graph._graph.Vertex object at 0x40168ae4>
As you can see, v1 and v2 return and have different addresses than the Vertex objects that are listed by the vertices iterator. My guess here is that the Vertex objects do point to the same underlying vertex in the C++ implementation of the graph.
Your guess is correct. We don't cache the Python objects corresponding to vertex and edge descriptors. Doug