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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_mode(self, payment_mode):
 """Sets the payment_mode of this CreditCardPayment. :param payment_mode: The payment_mode of this CreditCardPayment. :type: str """

        allowed_values = ["authorize", "capture"]
        if payment_mode is not None and payment_mode not in allowed_values:
            raise ValueError(
                "Invalid value for `payment_mode` ({0}), must be one of {1}"
                .format(payment_mode, allowed_values)
            )

        self._payment_mode = payment_mode