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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 graph(self, ig):
 """Specify the node and edge data. :param ig: Graph with node and edge attributes. :type ig: NetworkX graph or an IGraph graph. :returns: Plotter. :rtype: Plotter. """


        res = copy.copy(self)
        res._edges = ig
        res._nodes = None
        return res