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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 setControl( self, request_type, request, value, index, buffer_or_len, callback=None, user_data=None, timeout=0):
 """ Setup transfer for control use. request_type, request, value, index See USBDeviceHandle.controlWrite. request_type defines transfer direction (see ENDPOINT_OUT and ENDPOINT_IN)). buffer_or_len Either a string (when sending data), or expected data length (when receiving data). callback Callback function to be invoked on transfer completion. Called with transfer as parameter, return value ignored. user_data User data to pass to callback function. timeout Transfer timeout in milliseconds. 0 to disable. """

        if self.__submitted:
            raise ValueError('Cannot alter a submitted transfer')
        if self.__doomed:
            raise DoomedTransferError('Cannot reuse a doomed transfer')
        if isinstance(buffer_or_len, (int, long)):
            length = buffer_or_len
            # pylint: disable=undefined-variable
            string_buffer, transfer_py_buffer = create_binary_buffer(
                length + CONTROL_SETUP_SIZE,
            )
            # pylint: enable=undefined-variable
        else:
            length = len(buffer_or_len)
            string_buffer, transfer_py_buffer = create_binary_buffer(
                CONTROL_SETUP + buffer_or_len,
            )
        self.__initialized = False
        self.__transfer_buffer = string_buffer
        # pylint: disable=undefined-variable
        self.__transfer_py_buffer = integer_memoryview(
            transfer_py_buffer,
        )[CONTROL_SETUP_SIZE:]
        # pylint: enable=undefined-variable
        self.__user_data = user_data
        libusb1.libusb_fill_control_setup(
            string_buffer, request_type, request, value, index, length)
        libusb1.libusb_fill_control_transfer(
            self.__transfer, self.__handle, string_buffer,
            self.__ctypesCallbackWrapper, None, timeout)
        self.__callback = callback
        self.__initialized = True