Logged In: YES 
user_id=44345

I modified the Demo/sockets/unixclient.py script to the following:

# Echo client demo using Unix sockets
# Piet van Oostrum
from socket import *
FILE = 'blabla'
s = socket(AF_UNIX, SOCK_STREAM)
s.connect(FILE)
import cPickle
f = s.makefile("wb")
cPickle.dump("Hello, world", f)
f.close()
#s.send('Hello, world')
data = s.recv(1024)
s.close()
print 'Received', `data`

It seemed to work fine when connected to the corresponding
unixserver.py script.