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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 nodes_dump(self):
 """Dump the entire contents of the nodes table."""

        self._flush_nodes()
        for (graph, node, branch, turn,tick, extant) in self.sql('nodes_dump'):
            yield (
                self.unpack(graph),
                self.unpack(node),
                branch,
                turn,
                tick,
                bool(extant)
            )