Check to see when DNS for a new host has propagated

new_host_DNS.py

import requests
import sys
import time
import subprocess

if len(sys.argv) != 2:
    print 'Usage: new_host_DNS.py [url]'
    sys.exit(0)

NX = True
while NX:
    try:
        response = requests.get(sys.argv[1])
        NX = False
    except requests.exceptions.ConnectionError:
        sys.stdout.write('.')
        sys.stdout.flush()
        time.sleep(1)
print ''
print 'DNS has propagated'
subprocess.call(['say', 'DNS', 'has', 'propagated'])