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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 serial_number(self, serial_number):
 """ Sets the serial_number of this DeviceDataPostRequest. The serial number of the device. :param serial_number: The serial_number of this DeviceDataPostRequest. :type: str """

        if serial_number is not None and len(serial_number) > 64:
            raise ValueError("Invalid value for `serial_number`, length must be less than or equal to `64`")

        self._serial_number = serial_number