php selenium测试百度输入和跳转

#--coding=utf8


from selenium import webdriver;
import os;  
import time;
import json;
from selenium.webdriver.common.keys import Keys;
 
url='http://www.baidu.com';
chrome_driver = os.path.abspath(r"D:\Anaconda2\chromedriver.exe")
os.environ["webdriver.chrome.driver"] = chrome_driver
driver = webdriver.Chrome(chrome_driver);
driver.get(url);
driver.find_element_by_id('kw').send_keys('python'+Keys.ENTER)
xpath="//div[@class='s_tab']/a[1]";
driver.find_element_by_xpath(xpath).click();
driver.switch_to_window(driver.window_handles[-1])
xpath="//div[@class='s_tab']/a[2]";
driver.find_element_by_xpath(xpath).click();