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 selenium 的新手，只是想学习.当尝试通过 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:UserskulokeshAppDataLocalProgramsPythonPython36libsite-packagesseleniumwebdriverchromewebdriver.py", line 75, in __init__
    desired_capabilities=desired_capabilities)
  File "C:UserskulokeshAppDataLocalProgramsPythonPython36libsite-packagesseleniumwebdriver
emotewebdriver.py", line 156, in __init__
    self.start_session(capabilities, browser_profile)
  File "C:UserskulokeshAppDataLocalProgramsPythonPython36libsite-packagesseleniumwebdriver
emotewebdriver.py", line 251, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "C:UserskulokeshAppDataLocalProgramsPythonPython36libsite-packagesseleniumwebdriver
emotewebdriver.py", line 320, in execute
    self.error_handler.check_response(response)
  File "C:UserskulokeshAppDataLocalProgramsPythonPython36libsite-packagesseleniumwebdriver
emoteerrorhandler.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.以下是我的代码:

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，但我很困惑我在这里缺少什么.另外请推荐一些好的在线资源来学习 Python Selenium.我打开的 chrome 如下所示:

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

这个错误信息...

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)

...暗示 ChromeDriver 无法启动/生成新的 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	ochromedriver.exe')
driver.get('http://www.python.org')
print(driver.title)
driver.quit()

<小时>

其他注意事项

• 将 Selenium 升级到当前级别版本 3.14.0.李>
• 将 ChromeDriver 升级到当前的 ChromeDriver v2.41 级别.
• 将 Chrome 版本保持在 Chrome v66-68 级别之间.(根据 ChromeDriver v2.41 发行说明)
• 清理你的项目工作区通过你的IDE和重建你的项目只需要依赖.
• 执行你的 @Test.
• 总是在 tearDown(){} 方法中调用 driver.quit() 来关闭 &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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