nonblocking pipes with Popen

lol.sh

#!/bin/bash -e

i=0
while true; do
  echo "yadda yadda ||$i||"
  sleep 3;
  i=$(($i+1))
done

#while true; do #HILARIOUS:
#    hexdump /dev/urandom | head
#    echo
#    sleep 12
#done

wt.py

#!/usr/bin/env python2
import subprocess

p = subprocess.Popen(["./lol.sh"], bufsize=1, stdout=subprocess.PIPE)

import time

import IPython

import os, fcntl
flags = fcntl.fcntl(p.stdout, fcntl.F_GETFL) # get current p.stdout flags
fcntl.fcntl(p.stdout, fcntl.F_SETFL, flags | os.O_NONBLOCK)

i = 0
while True:
    try:
        #print("before block")
        vvv = p.stdout.read(1023)
        #print("after sunblock")
    except IOError, e:
        #IPython.embed()
        if e.errno == os.errno.EAGAIN:
            print("failbox")
            time.sleep(1) 
            continue
        else:
            raise
    #IPython.embed()
    #vvv = p.stdout.readline()
    print i, vvv, "\n"
    i+=1