KeyError:Gecko-dri的Python代码中的“sessionId”

Question

我在Python代码中安装了针对Selenium的Firefox web驱动程序，可以看到网页正在加载，但是出现了错误KeyError:'sessionId'：

Traceback (most recent call last):
File "web_FF_test.py", line 5, in setUp
self.driver = webdriver.Firefox(executable_path='/home/nataliya/Downloads/geckodriver')
File "/home/nataliya/.local/lib/python2.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 145, in __init__
keep_alive=True)
File "/home/nataliya/.local/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 92, in __init__
self.start_session(desired_capabilities, browser_profile)
File "/home/nataliya/.local/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 180, in start_session
self.session_id = response['sessionId']
KeyError: 'sessionId'.

My code: 
def login(self):
    self.driver.get("http://web page")
    time.sleep(3)
    username = self.driver.find_element_by_css_selector('#txtLoginEmail')
    username.send_keys('username')
    time.sleep(2)
    password = self.driver.find_element_by_id('txtLoginPassword')

等等

Answer 1

请将geckodriver版本0.16.1和selenium 3.4.1与firefox 52配合使用，nutshell需要升级selenium，geckodriver需要与firefox版本兼容