threadpool_test.py

#
# Testing multithreaded operations using concurrent.futures.
# 
# The concurrent.futures library was introduced in Python 3.2, but if you want to run it in 2.x, 
# you can download the backport of this library from http://pypi.python.org/pypi/futures 
#

from concurrent.futures import ThreadPoolExecutor
import requests

def ping_url(url, worker):
    try:
        res = requests.head(url)
    except e:
        res = e
    print "Completed %s " % worker

with ThreadPoolExecutor(max_workers = 4) as executor:
    url = "http://httpbin.org/delay/2"
    for worker in range(10):
        executor.submit(ping_url, url, worker)
    executor.shutdown()