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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 set_unspents(self, unspents):
 """ Set the unspent inputs for a transaction. :param unspents: a list of :class:`TxOut` (or the subclass :class:`Spendable`) objects corresponding to the :class:`TxIn` objects for this transaction (same number of items in each list) """

        if len(unspents) != len(self.txs_in):
            raise ValueError("wrong number of unspents")
        self.unspents = unspents