SessionNotCreatedException：消息：预期的浏览器二进制位置，但无法在默认位置找到二进制文件，没有“moz：firefoxOptions.binary”

Question

当我尝试在 Selenium 中创建 Firefox 实例时，我收到以下错误：

Message: Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line 

我在 Ubuntu 20.04 上运行
任何建议将不胜感激。

browser = webdriver.Firefox()

Traceback (most recent call last):
  File "key.py", line 10, in <module>
    browser = webdriver.Firefox()
  File "/usr/local/lib/python3.8/dist-packages/selenium/webdriver/firefox/webdriver.py", line 170, in __init__
    RemoteWebDriver.__init__(
  File "/usr/local/lib/python3.8/dist-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
    self.start_session(capabilities, browser_profile)
  File "/usr/local/lib/python3.8/dist-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "/usr/local/lib/python3.8/dist-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/usr/local/lib/python3.8/dist-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.SessionNotCreatedException: Message: Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line

Answer 1

此错误消息...

selenium.common.exceptions.SessionNotCreatedException: Message: Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line

...暗示GeckoDriver 在尝试启动/生成新的浏览上下文 即Firefox 浏览器时无法找到firefox 二进制文件/em> 会话。

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原因

此错误的可能原因可能是以下任一原因：

• Firefox 未安装在您的系统中。
• Firefox 未安装在系统的默认位置。

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解决方案

可能的解决方案是：

• 如果您的系统中没有安装 Firefox，您需要在执行测试之前安装它。

• 如果 Firefox 安装在自定义位置，您需要通过 @987654326 传递 firefox 二进制文件的绝对路径，如下所示@实例：

  from selenium import webdriver
  from selenium.webdriver.firefox.options import Options
  
  options = Options()
  options.binary_location = r"C:/location/to/Firefox/Binary/firefox.exe"
  driver = webdriver.Firefox(options=options, executable_path="C:/location/to/geckodriver.exe")
  driver.get('http://google.com/')
  

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参考文献

您可以在以下位置找到一些相关的详细讨论：

• InvalidArgumentException: Message: binary is not a Firefox executable error using GeckoDriver Firefox Selenium and Python
• Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided
• Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided using GeckoDriver