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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def print_cyjs_graph(self):
 """Return the assembled Cytoscape JS network as a json string. Returns ------- cyjs_str : str A json string representation of the Cytoscape JS network. """

        cyjs_dict = {'edges': self._edges, 'nodes': self._nodes}
        cyjs_str = json.dumps(cyjs_dict, indent=1, sort_keys=True)
        return cyjs_str