throws_away_bits.py

#!/usr/bin/env python

import eventlet
from eventlet.green import urllib2

def fetch(url):
    body = urllib2.urlopen(url).read()

pool = eventlet.GreenPool(15)
with open('files.txt') as f:
    urls = f.readlines()
    for result in pool.imap(fetch, urls):
        pass

writes_to_disk.py

#!/usr/bin/env python

import eventlet
from eventlet.green import urllib2

def fetch(url):
    response = urllib2.urlopen(url)
    name = url.rsplit('/', 1)[1]
    with open(name, 'w') as f:
        f.write(response.read())

pool = eventlet.GreenPool(7)
with open('files.txt') as f:
    urls = f.readlines()
    for result in pool.imap(fetch, urls):
        pass