ttfb with python 3.6

ttfb.py

import time
from urllib import request

host = "https://www.buscape.com.br/notebook"
opener = request.build_opener()
request = request.Request(host)
request.add_header('user-agent', 'firefox')
start = time.time()
resp = opener.open(request)
# read one byte
resp.read(1)
ttfb = time.time() - start

print("The TTFirst Byte of " +host+" is: "+str(ttfb))