a test for checking if a site updates.

if-modified-since-test.py

import requests
import time
timestamp = time.time()
timeformat = (time.strftime('%a, %d %b %Y %H:%M:%S GMT', time.gmtime(timestamp)))
url = 'http://stackoverflow.com/'
for x in range(100):
    header = {'If-Modified-Since': timeformat}
    r = requests.head(url, headers=header)
    print r

#if response is 200:
#it updated

#If reponce is 304:
#it didn't