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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 get_string(self):
 """Return the assembled graph as a string. Returns ------- graph_string : str The assembled graph as a string. """

        graph_string = self.graph.to_string()
        graph_string = graph_string.replace('\\N', '\\n')
        return graph_string