def get_dotstr(self):
        """Return a string containing DAG graph in Grpahviz's dot language."""
        dotobj = self.gosubdagplot.get_pydot_graph() # pydot.Dot
        dotstr = dotobj.create_dot()
        return dotstr
def get_dotstr ( self ) : dotobj = self . gosubdagplot . get_pydot_graph ( ) dotstr = dotobj . create_dot ( ) return dotstr
Return a string containing DAG graph in Grpahviz's dot language.