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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 block(self, *args, **kwargs):
 """Add a block index. Shortcut of :class:`recordlinkage.index.Block`:: from recordlinkage.index import Block indexer = recordlinkage.Index() indexer.add(Block()) """

        indexer = Block(*args, **kwargs)
        self.add(indexer)

        return self