在Windows 7中使用python2.7，selenium（最新版本用pip下载）和Firefox 25.0.1 .

我尝试运行以下最小的selenium代码示例，但它只是打开一个空白的Firefox页面并抛出WebdriverException：

from selenium import webdriver
driver = webdriver.Firefox() 

 Traceback (most recent call last):
  File "", line 1, in 
    driver = webdriver.Firefox()
  File "C:\Python27\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 60, in init
    desired_capabilities=capabilities)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 71, in init
    self.start_session(desired_capabilities, browser_profile)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 113, in start_session
    'desiredCapabilities': desired_capabilities,
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 164, in execute
    self.error_handler.check_response(response)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 136, in check_response
    raise exception_class(value)
WebDriverException: Message: u'\r\n\r\nGateway Timeout 504\r\n \r\n\r\n'

当我使用Selenium IDE运行测试脚本时，我没有连接问题，只有python代码 . 我怎样才能解决这个问题？我无法超越“driver = webdriver.Firefox（）”行 .

python firefox selenium