The code is in devel/sage/sage/graphs/graph.py

The problematic line is just this one (line 5490 in devel/sage/sage/
graphs/graph.py) :

for u, v, _ in self.edge_iterator() :
    if u != v :
        p += arrow((pos[u][0], pos[u][1]), (pos[v][0], pos[v][1]),
**edge_style)

I will try to fix it for multiedges graphs.


Vincent D

On 16 jan, 04:47, Jason Grout <[email protected]> wrote:
> William Stein wrote:
> > So I strongly encourage you to do something about this, and can tell
> > you I think nobody else is working on it.   Regarding finding the
> > code, it's probably somewhere in
> >    SAGE_ROOT/devel/sage/sage/plot/
> > but I'm not sure.  You might try
> >    sage: search_src?
>
> I believe the plotting code is in devel/sage/sage/graphs/graph.py.  Look
> at the plot function.
>
> Jason
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