select() on pipe

[Brad Murdoch]

im trying to run the select.selct() on a unix pipe, my expectation is 
that it will block untill there is something there to read, then 
continue. It seems to do this untill the pipe is written to once, then i 
get a busy while loop.
shouldnt this stop each time, to wait  for something to be written to 
the pipe. obviously im a novice when it comes to python programming, 
what am i missing here.

cheers..

#!/usr/bin/python

import os
import sys
import select

try:
 fifo = open('test.fifo','r')
except Exception, blah:
 report = "ERROR 001: " + str(blah)
 print report
 sys.exit(2)

while 1:
 line = False
 r,w,x = select.select([fifo],[],[])
 if r:
    line=fifo.read()
    print line