Re: [igraph] python-igraph: Get graph from edge

[Tamás Nepusz]

Indeed, python-igraph keeps track of the graph the edge belongs to, but this is 
not exposed via an attribute yet -- to be honest, I have no idea why, probably 
simply because I forgot to include it. The EdgeSeq itself (e.g., g.es) has a 
"graph" attribute that you can use to get back to the graph. I will make sure 
that the same attribute is added to Edge and Vertex objects in the next release.

-- 
T.

On 19 Jun 2013, at 22:23, Bradford Boyle <address@hidden> wrote:

> Using python-igraph, is it possible to, given an edge, get the graph that the 
> edge is contained in? Suppose that I have a graph G, executing 
> `print(g.__repr__())` returns:
> 
>     <igraph.Graph object at 0x7ff56ecbf810>
> 
> whereas `print(g.es[0].__repr__())` returns:
> 
>     <igraph.Edge(<igraph.Graph object at 0x7ff56ecbf810>, 0, {})>
> 
> This would suggest to me that internally, igraph is keeping track of which 
> graph object an edge belongs to. The motivation for my question is that given 
> only an edge, I cannot get attributes from the source or target vertices. To 
> access the vertex attributes, I would need both the graph and the edge. If 
> the graph could be gotten from the edge, then edge be sufficient.
> 
> Bradford
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