Re: [igraph] problem with get_eid with neighbors

[Tamas Nepusz]

Hi Simone,

Apparently you have hit a bug in the Python interface :( The exception  
happens when in_nei is empty; in this case, g.vs[in_nei] is still the  
complete VertexSeq of the graph instead of an empty VertexSeq. I'll  
try to commit a fix soon; in the meanwhile, check explicitly if in_nei  
is empty:

for node in g.vs:
        in_nei = g.neighbors(node.index, type="in")
        if not in_nei: continue
        for vicino in g.vs[in_nei]:
                if vicino["color"] == "blue":
                        eid = g.get_eid(vicino.index, node.index, directed=True)

Best,
--
Tamas