如何切换python网页窗口

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import time
#打开一个会话
diver = webdriver.Chrome()
#全屏
diver.maximize_window()
diver.implicitly_wait(30)
 
try:
    # 访问百度链接
    diver.get("https://www.baidu.com")
    WebDriverWait(diver, 20).until(EC.visibility_of_element_located((By.ID, "kw")))
    # 等待文本框可见
    diver.find_element_by_id("kw").send_keys("百度贴吧")  # 输入内容
    WebDriverWait(diver, 20).until(EC.visibility_of_element_located((By.ID, "su")))
    # 等待百度一下可见
    diver.find_element_by_id("su").click()  # 点击
    WebDriverWait(diver, 20).until(
        EC.visibility_of_element_located((By.XPATH, '//a[text()="吧 - "]')))
    diver.find_element_by_xpath('//a[text()="吧 - "]').click()  # 点击
    time.sleep(3)
    handles_list = diver.window_handles
    print(handles_list)# 获取所有窗口的handle
    diver.switch_to.window(handles_list[-1])  # 切换到最后一个窗口——切换到全新的html页面
    # 等待百度贴吧可见
    WebDriverWait(diver, 20).until(
        EC.visibility_of_element_located((
            By.ID,"tab_picture")))  # 等待图片按钮可见
    diver.find_element_by_id("tab_picture").click()
    time.sleep(3)
    # 退出
    diver.quit()
except Exception as e:
    # 退出
    diver.quit()
    raise e