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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 to_networkx(self):
 """Return a NetworkX Graph object representing the minimum spanning tree. Edge weights in the graph are the distance between the nodes they connect. Nodes have a `data` attribute attached giving the data vector of the associated point. """

        try:
            from networkx import Graph, set_node_attributes
        except ImportError:
            raise ImportError('You must have networkx installed to export networkx graphs')

        result = Graph()
        for row in self._mst:
            result.add_edge(row[0], row[1], weight=row[2])

        data_dict = {index: tuple(row) for index, row in enumerate(self._data)}
        set_node_attributes(result, data_dict, 'data')

        return result