urls = ['http://www.google.com/intl/en_ALL/images/logo.gif',
    'https://wiki.secondlife.com/w/images/secondlife.jpg',
    'http://us.i1.yimg.com/us.yimg.com/i/ww/beta/y3.gif']
import eventlet
from eventlet.green import urllib2

def fetch(url):
    body = urllib.request.urlopen(url).read()
return url, body
pool = eventlet.GreenPool()
for url, body in pool.imap(fetch, urls):
    pass
Concurrent downloads - Python