Python AutoShutdown v2

from os import *
from httplib import *
from subprocess import *
import time
import platform

def testconnection():
    f = HTTPConnection("www.google.com")
    try:
        f.request("GET", "/")
        except Exception:
        return False
    return True;


while True:
    ff = testconnection()
    if(ff == False):
        print("No Internet Connection! Shutting Down System!")
        if(platform.system() == 'Windows'):
            call(["shutdown","/s","/t","100"])
        elif(platform.system() == 'Linux'):
            call(["sudo", "poweroff"])
        exit(0)
    elif(ff == True):
        print("InternetConnection Intact")
                print("Time to sleep some time")
                time.sleep(60*15)