Selenium-WebDriver API
seleniumhq官方文档：
http://docs.seleniumhq.org/docs/03_webdriver.jsp
Selenium Python文档：
http://selenium-python.readthedocs.io/getting-started.html
Selenium简单的用法示例
# -*- coding:utf-8 -*-
import os
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
chromedriver = "./chromedriver"
driver = webdriver.Chrome(executable_path=chromedriver)
print 'start'
driver.get("http://www.baidu.com/")
assert u"百度一下" in driver.title
elem = driver.find_element_by_name("wd")
elem.send_keys("selenium")
elem.send_keys(Keys.RETURN)
assert "selenium" in driver.title
print 'end'
#driver.close()