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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 without_nodes(self, edge: Edge) -> 'BipartiteGraph[TLeft, TRight, TEdgeValue]': """Returns a copy of this bipartite graph with the given edge and its adjacent nodes removed."""

        return BipartiteGraph(((n1, n2), v) for (n1, n2), v in self._edges.items() if n1 != edge[0] and n2 != edge[1])