Sockets in python

[OneMustFall]

> What's your set-up and which cord are you pulling?
>

Well i now i think the clue is in the OS, i have sniffed and it seems
that Twisted have no magic.
It is seems that i simply tested things in a wrong way -
when i pulled cord from ethernet card windows determined that network
lost and started to closing all sockets opened to that network (and so
EINVAL or other OS error raised when twisted tryed to read wrom that
socket),
while the server did had a network - and it was right thing that server
was thinking that socket is alive.