Python Selenium自动化: 复用浏览器、切换标签页及元素操作

import os
import psutil
from selenium.webdriver.chrome.options import Options
from selenium import webdriver
from selenium.webdriver.common.by import By

# 检查是否已经存在浏览器实例，如果存在则不再创建
for proc in psutil.process_iter():
    try:
        if 'chrome' in proc.name() and '--remote-debugging-port=9223' in proc.cmdline():
            options = Options()
            options.add_experimental_option('debuggerAddress', '127.0.0.1:9223')
            break
    except:
        pass
else:
    # 创建浏览器实例
    os.system(r'start chrome --remote-debugging-port=9223 --user-data-dir="D:\评阅用"')
    options = Options()
    options.add_experimental_option('debuggerAddress', '127.0.0.1:9223')

# 在已有的浏览器实例中查找标签页
driver = webdriver.Chrome(options=options)
tabs = driver.window_handles
for tab in tabs:
    driver.switch_to.window(tab)
    if driver.title == '国家开放大学个人空间':
        break

# 在网页中查找课程
elements = driver.find_elements(By.CLASS_NAME,'learning_course')
for element in elements:
    if element.text == '形势与政策':
        element.click()
        break

# 切换到点击课程后的标签页
tabs = driver.window_handles
for tab in tabs:
    if tab != driver.current_window_handle:
        driver.switch_to.window(tab)
        break

# 点击展开全部按钮
toggle_button = driver.find_element(By.CLASS_NAME, 'icon.font.font-toggle-all-collapsed')
toggle_button.click()