def transfer(self, address, messages):
        """Transfer `messages` to the specified I2C `address`. Modifies the
        `messages` array with the results of any read transactions.

        Args:
            address (int): I2C address.
            messages (list): list of I2C.Message messages.

        Raises:
            I2CError: if an I/O or OS error occurs.
            TypeError: if `messages` type is not list.
            ValueError: if `messages` length is zero, or if message data is not valid bytes.

        """
        if not isinstance(messages, list):
            raise TypeError("Invalid messages type, should be list of I2C.Message.")
        elif len(messages) == 0:
            raise ValueError("Invalid messages data, should be non-zero length.")

        # Convert I2C.Message messages to _CI2CMessage messages
        cmessages = (_CI2CMessage * len(messages))()
        for i in range(len(messages)):
            # Convert I2C.Message data to bytes
            if isinstance(messages[i].data, bytes):
                data = messages[i].data
            elif isinstance(messages[i].data, bytearray):
                data = bytes(messages[i].data)
            elif isinstance(messages[i].data, list):
                data = bytes(bytearray(messages[i].data))

            cmessages[i].addr = address
            cmessages[i].flags = messages[i].flags | (I2C._I2C_M_RD if messages[i].read else 0)
            cmessages[i].len = len(data)
            cmessages[i].buf = ctypes.cast(ctypes.create_string_buffer(data, len(data)), ctypes.POINTER(ctypes.c_ubyte))

        # Prepare transfer structure
        i2c_xfer = _CI2CIocTransfer()
        i2c_xfer.nmsgs = len(cmessages)
        i2c_xfer.msgs = cmessages

        # Transfer
        try:
            fcntl.ioctl(self._fd, I2C._I2C_IOC_RDWR, i2c_xfer, False)
        except __HOLE__ as e:
            raise I2CError(e.errno, "I2C transfer: " + e.strerror)

        # Update any read I2C.Message messages
        for i in range(len(messages)):
            if messages[i].read:
                data = [cmessages[i].buf[j] for j in range(cmessages[i].len)]
                # Convert read data to type used in I2C.Message messages
                if isinstance(messages[i].data, list):
                    messages[i].data = data
                elif isinstance(messages[i].data, bytearray):
                    messages[i].data = bytearray(data)
                elif isinstance(messages[i].data, bytes):
                    messages[i].data = bytes(bytearray(data))
dataset/ETHPy150Open vsergeev/python-periphery/periphery/i2c.py/I2C.transfer