Selenium Firefox webdriver 通过 geckodriver 导致错误：“geckodriver”可执行文件需要在 PATH 中

Question

我正在像这样使用 Selenium：

#!/usr/bin/env python

from pyvirtualdisplay import Display
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

firefox_capabilities = DesiredCapabilities.FIREFOX
firefox_capabilities['marionette'] = True

browser = webdriver.Firefox(capabilities=firefox_capabilities)

# Set screen resolution to 1366 x 768 like most 15" laptops
display = Display(visible=0, size=(1366, 768))
display.start()


# Sets the width and height of the current window
browser.set_window_size(1366, 768)

# Open the URL
browser.get('http://www.vionblog.com/')

# set timeouts
browser.set_script_timeout(30)
browser.set_page_load_timeout(30) # seconds

# Take screenshot
browser.save_screenshot('vionblog.png')

# quit browser
browser.quit()

# quit Xvfb display
display.stop()

但是当我运行脚本时，出现以下错误：

Traceback (most recent call last):   
  File "a.py", line 10, in <module>
    browser = webdriver.Firefox(capabilities=firefox_capabilities)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 145, in __init__
    self.service.start()
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/service.py", line 81, in start
    os.path.basename(self.path), self.start_error_message) 
selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH.

Answer 1

来自您的错误消息

Message: 'geckodriver' executable needs to be in PATH.

我们可以理解，问题在于 Selenium 找不到 geckodriver 可执行文件。

您有 2 个解决方案：

1. Add geckodriver.exe path to your PATH variable environment
2. Inform the geckodriver.exe path when starting the webdriver