from subprocess import Popen, PIPE
import re
host = 'google.com'
hops = []
p = Popen(['tracert', host], stdout=PIPE)
while True:
    line = str(p.stdout.readline())
    ip = re.findall( r'[0-9]+(?:\.[0-9]+){3}', line)
    if ip == []:
        pass
    else:
        print(ip[0])
        hops.append(ip[0])
        if hops[0] == hops[-1] and len(hops) > 1:
            break