code: def print_cyjs_graph(self):
          
          cyjs_dict = {'edges': self._edges, 'nodes': self._nodes}
          cyjs_str = json.dumps(cyjs_dict, indent=1, sort_keys=True)
          return cyjs_str
docs: Return the assembled Cytoscape JS network as a json string.
  
          Returns
          -------
          cyjs_str : str
              A json string representation of the Cytoscape JS network.