FTD2XX: How to pass byte array to ftd2xx.ftd2xx.FTD2XX.write() method?

Question

I have a simple binary byte array that I need to send to USB serial port using ftd2xx library in Python.

import ftd2xx as ft
import time

message = [86, 0xff, 0xff, 0, 0, 72, 40 ]

def openPort(index):
  s = r'\000' * 64
  port = ft.open(index, False)  # open port
  port.setUSBParameters(25600, 1024)    # setup necessary parameters
  port.setBaudRate(2000000)
  port.setDataCharacteristics(8, 0, 0)
  port.setTimeouts(16, 500)
  port.clrRts()  # power reset for attached hardware
  time.sleep(3)
  port.setRts()
  time.sleep(0.1)
  return port

cp = openPort(0)
cp.write(message)

In this case cp.write(message) throws WrongType exception. If I try to replace the array with message = b'V\xFF\xFF\x00\x00\x48\x28', it raises the same exception. In documentation I cannot see any hint what is in fact expected here. The original, underlying function in FTD2XX (FT_Write) will accept any byte buffer up to a certain size.