selenium.common.exceptions.WebDriverException:消息:未知错误:无法通过Selenium使用ChromeDriver发现打开的页面 [英] selenium.common.exceptions.WebDriverException: Message: unknown error: unable to discover open pages using ChromeDriver through Selenium

问题描述

我是硒的新手，只是想学习.尝试通过ChromeDriver打开Chrome浏览器时出现以下错误:

I am a newbie to selenium just trying to learn. When tried opening Chrome browser through ChromeDriver I got the below error:

Traceback (most recent call last):
  File "selenium_practise1_chrome.py", line 5, in <module>
    driver = webdriver.Chrome()
  File "C:\Users\kulokesh\AppData\Local\Programs\Python\Python36\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 75, in __init__
    desired_capabilities=desired_capabilities)
  File "C:\Users\kulokesh\AppData\Local\Programs\Python\Python36\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 156, in __init__
    self.start_session(capabilities, browser_profile)
  File "C:\Users\kulokesh\AppData\Local\Programs\Python\Python36\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 251, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "C:\Users\kulokesh\AppData\Local\Programs\Python\Python36\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 320, in execute
    self.error_handler.check_response(response)
  File "C:\Users\kulokesh\AppData\Local\Programs\Python\Python36\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: unknown error: unable to discover open pages
  (Driver info: chromedriver=2.40.565498 (ea082db3280dd6843ebfb08a625e3eb905c4f5ab),platform=a lotows NT 6.1.7601 SP1 x86_64)

尝试了很多谷歌搜索，但没有任何帮助.下面是我的代码:

Tried alot of googling but nothing helped. Below is my code:

from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
from selenium.webdriver.common.keys import Keys

driver = webdriver.Chrome()
driver.get('http://www.python.org')
print(driver.title)

这不是要处理的代码，但是我很困惑我在这里缺少什么. 另外，请提供一些不错的在线资源来学习Python Selenium. 我的Chrome打开后如下图所示:

This is not a code to deal with but I am confused what am I missing here. Also please suggest some good online resource to learn Python Selenium. My chrome opened was looking like below:

推荐答案

此错误消息...

selenium.common.exceptions.WebDriverException: Message: unknown error: unable to discover open pages
  (Driver info: chromedriver=2.40.565498 (ea082db3280dd6843ebfb08a625e3eb905c4f5ab),platform=a lotows NT 6.1.7601 SP1 x86_64)

...表示 ChromeDriver 无法启动/产生新的 WebBrowser ，即 Chrome浏览器会话.

...implies that the ChromeDriver was unable to initiate/spawn a new WebBrowser i.e. Chrome Browser session.

通过ChromeOptions()将参数 --no-sandbox 添加到现有代码中，如下所示:

Add the argument --no-sandbox through ChromeOptions() to your existing code as follows:

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

options = Options()
options.add_argument('--no-sandbox') # Bypass OS security model
driver = webdriver.Chrome(chrome_options=options, executable_path=r'C:\path\to\chromedriver.exe')
driver.get('http://www.python.org')
print(driver.title)
driver.quit()

---

其他注意事项

• 硒升级到当前级别版本3.14.0 .
• 将 ChromeDriver 升级到当前的 ChromeDriver v2.41 级.
• 在 Chrome v66-68 级别之间保留 Chrome 版本. (根据ChromeDriver v2.41发行说明)
通过 IDE
• 清理您的项目工作区和重建您的项目，并且仅具有必需的依赖项.
• 执行您的 @Test .
• 始终在tearDown(){}方法中调用driver.quit()以关闭&优雅地销毁 WebDriver 和 Web Client 实例.

---

Additional considerations

• Upgrade Selenium to current levels Version 3.14.0.
• Upgrade ChromeDriver to current ChromeDriver v2.41 level.
• Keep Chrome version between Chrome v66-68 levels. (as per ChromeDriver v2.41 release notes)
• Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
• Execute your @Test.
• Always invoke driver.quit() within tearDown(){} method to close & destroy the WebDriver and Web Client instances gracefully.

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