selenium python 多窗口的切换 句柄

# -*- coding:utf-8 -*-
from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains
from selenium.webdriver.support.ui import WebDriverWait

import time

driver = webdriver.Firefox(executable_path='/Users/huiliang/Downloads/geckodriver')
driver.get("http://www.baidu.com/")
#driver.implicitly_wait(10)
print 'baidu:' + driver.current_window_handle

driver.find_element_by_id('kw').clear()
driver.find_element_by_id('kw').send_keys(u'百度网盘')
driver.find_element_by_id('su').click()
driver.implicitly_wait(10)

driver.find_element_by_partial_link_text(u'享你所想').click()
print 'baiduwangpan:' + driver.current_window_handle

print driver.window_handles

'''
每一个浏览器都有自己的句柄，也就是current_window_handle
查看所有浏览器的句柄 window_handles 是以数组形式出现
切换语句 driver.switch_to.window(window_handles[2])
'''

time.sleep(10)
driver.quit()