Running headless chrome with selenium python driver

from selenium.webdriver.common import keys
from pyvirtualdisplay import Display
import os
from selenium import webdriver

chromedriver = "/usr/local/bin/chromedriver"
os.environ["webdriver.chrome.driver"] = chromedriver
display = Display(visible=0, size=(1024,768))
display.start()

br = webdriver.Chrome(chromedriver)
br.get("http://ya.ru")