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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 send(self, msg, timeout=None):
 """ Send a message over the serial device. :param can.Message msg: Message to send. .. note:: Flags like ``extended_id``, ``is_remote_frame`` and ``is_error_frame`` will be ignored. .. note:: If the timestamp is a float value it will be converted to an integer. :param timeout: This parameter will be ignored. The timeout value of the channel is used instead. """

        try:
            timestamp = struct.pack('<I', int(msg.timestamp * 1000))
        except struct.error:
            raise ValueError('Timestamp is out of range')
        try:
            a_id = struct.pack('<I', msg.arbitration_id)
        except struct.error:
            raise ValueError('Arbitration Id is out of range')
        byte_msg = bytearray()
        byte_msg.append(0xAA)
        for i in range(0, 4):
            byte_msg.append(timestamp[i])
        byte_msg.append(msg.dlc)
        for i in range(0, 4):
            byte_msg.append(a_id[i])
        for i in range(0, msg.dlc):
            byte_msg.append(msg.data[i])
        byte_msg.append(0xBB)
        self.ser.write(byte_msg)