无法通过 selenium geckodriver 启动 Firefox 浏览器，出现错误：服务 geckodriver 意外退出。状态码是：-9

Question

代码块：

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

from selenium.webdriver.firefox.service import Service
from selenium.webdriver.firefox.options import Options

new_driver_path = '/Users/username/Desktop/Python/geckodriver'
new_binary_path = '/Applications/Firefox.app/Contents/MacOS/firefox-bin'

ops = Options()
ops.binary_location = new_binary_path
serv = Service(new_driver_path)
driver = webdriver.Firefox(service=serv, options=ops)

在运行上述 python 程序时，我收到以下错误。

Traceback (most recent call last):
  File "prog.py", line 13, in <module>
driver = webdriver.Firefox(service=serv, options=ops)
  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 174, in __init__
self.service.start()
  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/common/service.py", line 98, in start
self.assert_process_still_running()
  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/common/service.py", line 112, in assert_process_still_running
% (self.path, return_code)
selenium.common.exceptions.WebDriverException: Message: Service /Users/chetanparakh/Desktop/Python/geckodriver unexpectedly exited. Status code was: -9

我可能错了，但 new_binary_path 似乎有问题。

Answer 1

此错误消息...

self.assert_process_still_running()
  File "/usr/local/lib/python3.7/site-packages/selenium/webdriver/common/service.py", line 112, in assert_process_still_running
% (self.path, return_code)
selenium.common.exceptions.WebDriverException: Message: Service /Users/chetanparakh/Desktop/Python/geckodriver unexpectedly exited. Status code was: -9

...暗示GeckoDriver 的先前实例仍然存在，因此程序无法启动/生成新的GeckoDriver 进程。

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解决方案

始终在 tearDown(){} 方法中调用 driver.quit() 以优雅地关闭和销毁 WebDriver 和 Web Client 实例。