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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 payment_end(self, account, wallet):
 """ End a payment session. Marks the account as available for use in a payment session. :param account: Account to mark available :type account: str :param wallet: Wallet to end payment session for :type wallet: str :raises: :py:exc:`nano.rpc.RPCException` True """


        account = self._process_value(account, 'account')
        wallet = self._process_value(wallet, 'wallet')

        payload = {"account": account, "wallet": wallet}

        resp = self.call('payment_end', payload)

        return resp == {}