Hi,
in the page
http://igraph.org/python/doc/igraph.GraphBase-class.html#neighbors
it's said
Returns adjacent vertices to a given vertex.
Parameters:
vertex - a vertex ID
mode - whether to return only predecessors (OUT), successors (IN) or
both (ALL).
It seems to me that it inverts the meaning between predecessors an
successors.
A quick test on igraph seems to confirm: if I get v from
neighbors(u,mode=OUT) and I search for (v,u) i.e. v is a predecessor of
u, I cannot find the edge, while the contrary works.
Thank you for this beautiful work,
Matteo
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