selenium控制页面移动到底部

from selenium import  webdriver
from selenium.webdriver.support.wait import WebDriverWait
import time
driver = webdriver.Firefox()
driver.get("http://www.baidu.com")
driver.execute_script("document.getElementById(\"kw\").value=\"selenium\"")
WebDriverWait(driver, 10).until(lambda driver : driver.find_element_by_xpath(".//*[@id='container']/div[2]/div/div[2]"))
driver.execute_script("window.scrollTo(0,document.body.scrollHeight)")
time.sleep(5)
#driver.quit()