Dumb mistake.  Sorry and thanks for your help.

On Mon Dec 22 2014 at 6:20:08 PM Tamas Nepusz <[email protected]> wrote:

> > *pa = ethics_net.get_shortest_paths(beg_node,end_node)*
> > [...]
> > *ValueError: no such vertex: '12'*.
> >
> > There is a vertex 12, I created it with this statement:
> You are passing "12" as a string while it should either be a vertex index
> (i.e. a numeric value) or the value of the "name" attribute of some vertex
> that
> identifies the vertex uniquely.
>
> T.
>
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