'Pretty print the graph.  @imarks determine whether the printed graph
represents instructions (coarse grained) for easier navigation,  or
exact statements.'

def pp(self, imarks=False):

    for e in self.graph.edges():
        data = dict(self.graph.get_edge_data(e[0], e[1]))
        data['label'] = (((str(data['label']) + '    ;    ') + self._simproc_info(e[0])) + self._simproc_info(e[1]))
        self._print_edge(e, data, imarks)
