驱动浏览器

谷歌驱动包：http://chromedriver.storage.googleapis.com/index.html
例：
下载后解压，将 chromedriver.exe复制到下面两个目录中：
Chrome目录：比如C:\Program Files (x86)\Google\Chrome\Application
Python目录：比如D:\test\Python3.6

from selenium import webdriver
import time
driver = webdriver.Chrome(r'C:\Program Files (x86)\Google\Chrome\Application\chromedriver.exe') (chrome括号内是谷歌浏览器文件驱动路径)

Ie
from selenium import webdriver
import time
driver = webdriver.Ie()

火狐
from selenium import webdriver
import time
driver = webdriver.Firefox()