Python Selenium脚本崩溃，报Element Not Found错误求助

我正在开发一个Python机器人，运行代码时能正确打开列表中的第一个链接，但随后崩溃，出现Element Not Found错误。我是Python新手，不知道该如何解决。

代码示例 #

options = Options()
options.add_experimental_option("detach", True)

chromedriver = webdriver.Chrome(service=Service(ChromeDriverManager().install()), options=options)
chromedriver.get("https://www.ebay.co.uk/usr/usernamehere")
links = chromedriver.find_elements("xpath", "//ol[@class='pagination__items']//a[@href]")

# Create a list to store the opened window handles
window_handles = []

for link in links:
    url = link.get_attribute("href")
    print(url)
    
    # Open the link in a new tab
    chromedriver.execute_script("window.open('"+url+"', '_blank');")
    
    # Switch to the newly opened tab
    chromedriver.switch_to.window(chromedriver.window_handles[-1])
    
      # Wait for an element on the page to become visible
    element = WebDriverWait(chromedriver, 10).until(
        EC.presence_of_element_located((By.XPATH, "//some_xpath_selector"))
    )
    # Perform your actions on the page here
    # For example, you can get the page title:
    print(chromedriver.title)
    
    # Add the window handle to the list
    window_handles.append(chromedriver.current_window_handle)
    
# Switch back to the first tab
chromedriver.switch_to.window(chromedriver.window_handles[0])

# Close all the other tabs
for handle in window_handles[1:]:
    chromedriver.switch_to.window(handle)
    chromedriver.close()
    
# Switch back to the first tab and quit the browser
chromedriver.switch_to.window(chromedriver.window_handles[0])
chromedriver.quit()

错误日志 #

[20612:16724:0323/231628.565:ERROR:device_event_log_impl.cc(222)] [23:16:28.565] USB: usb_service_win.cc:104 SetupDiGetDeviceProperty({{A45C254E-DF1C-4EFD-8020-67D146A850E0}, 6}) failed: Element not found. (0x490)

[20612:16724:0323/231628.566:ERROR:device_event_log_impl.cc(222)] [23:16:28.565] USB: usb_service_win.cc:415 Could not read device interface GUIDs: The system cannot find the file specified. (0x2)

[20612:16724:0323/231628.566:ERROR:device_event_log_impl.cc(222)] [23:16:28.566] USB: usb_service_win.cc:104 SetupDiGetDeviceProperty({{A45C254E-DF1C-4EFD-8020-67D146A850E0}, 6}) failed: Element not found. (0x490)

[20612:16724:0323/231628.580:ERROR:device_event_log_impl.cc(222)] [23:16:28.580] USB: usb_device_handle_win.cc:1046 Failed to read descriptor from node connection: A device attached to the system is not functioning. (0x1F)

[20612:16724:0323/231628.599:ERROR:device_event_log_impl.cc(222)] [23:16:28.598] USB: usb_device_handle_win.cc:1046 Failed to read descriptor from node connection: A device attached to the system is not functioning. (0x1F)

解决办法 #

1. 区分错误类型 #

你看到的USB相关错误是ChromeDriver与系统USB设备的兼容性问题，不会导致代码崩溃，真正让代码终止的是WebDriverWait等待的元素定位失败（也就是代码中的//some_xpath_selector对应的元素不存在）。

2. 修复元素定位问题 #

• 替换//some_xpath_selector为目标页面真实存在的元素XPath：打开Chrome开发者工具（F12），找到目标元素右键选择「复制」→「复制XPath」。
• 如果元素是动态加载的，建议改用EC.visibility_of_element_located代替EC.presence_of_element_located，前者确保元素可见，后者仅确认元素存在于DOM中。

3. 优化循环逻辑，避免DOM引用失效 #

循环中打开新标签后，原页面的links元素列表可能因为DOM变化失效，建议先提取所有链接URL再循环处理：

# 先提取所有链接URL，避免后续DOM变化导致元素引用丢失
links = chromedriver.find_elements("xpath", "//ol[@class='pagination__items']//a[@href]")
url_list = [link.get_attribute("href") for link in links]

# 循环处理每个URL
for url in url_list:
    print(url)
    chromedriver.execute_script("window.open('"+url+"', '_blank');")
    chromedriver.switch_to.window(chromedriver.window_handles[-1])
    
    # 等待元素，替换为真实的XPath
    try:
        element = WebDriverWait(chromedriver, 10).until(
            EC.visibility_of_element_located((By.XPATH, "//真实元素的XPath"))
        )
        print(chromedriver.title)
        window_handles.append(chromedriver.current_window_handle)
    except TimeoutException:
        # 处理元素找不到的情况，比如跳过当前页面
        print(f"页面 {url} 未找到目标元素，跳过")
        chromedriver.close()  # 关闭当前失败的标签页
        continue

4. 屏蔽USB错误日志（可选） #

如果觉得USB日志干扰视线，可以在ChromeOptions中添加参数屏蔽：

options.add_experimental_option('excludeSwitches', ['enable-logging'])

内容的提问来源于stack exchange，提问作者Abdullah Ergun