[Twisted-Python] Problem w/ TNPE Example on Windows

[Viktor Ransmayr]

Hello,

    I'm new to Twisted and just started reading "Twisted Network Programming
Essentials".

The example "dataforward.py" in chapter 2 creates a traceback and an import
error, if executed on my laptop running WinXP/Pro-SP2, using Python-2.4.2
and Twisted-2.1.0

The import error complains about a missing module "fcntl" required by
...\twisted\internet\fdesc.py

Reading the python documentation states that the "fcntl" module is 
available on
Unix only. - Does that mean, that this example is working on Unix only or
what am I missing?

Kind regards,

    Viktor Ransmayr