Index 1 of an edge in the graph is of type List. See common.py#L111, but is replaced with a string in some cases in GenTrafficScapy.py#L357
Incidentally, this does not generate a bug, since the cases in which it is replaced with a string - it is interpreted as a string later on, and as a List otherwise.
Not a good practice. Is this worth fixing @rajkiranjoshi ?