Python 含PhantomJS的Selenium给出了KeyError:'；sessionId'；尝试启动会话时

我试图在Mac上将Selenium（2.47.3）与PhantomJS（2.0.0）一起使用，但收到标题中的错误。Python是3.5.0

Traceback (most recent call last):
File "/Users/QuickSilver/Desktop/autocrawlerfinal.py", line 31, in <module>
driver = webdriver.PhantomJS('/Users/QuickSilver/Desktop/crawler/phantomjs-2.0.0-macosx/bin/phantomjs', port=631)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/phantomjs/webdriver.py", line 56, in __init__
desired_capabilities=desired_capabilities)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/remote/webdriver.py", line 87, in __init__
self.start_session(desired_capabilities, browser_profile)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/remote/webdriver.py", line 143, in start_session
self.session_id = response['sessionId']
KeyError: 'sessionId'

---

在线上唯一提到此错误的是系统代理，但没有，并且localhost也添加到了异常中。是什么导致了这种情况？

有时会在这里看到类似的问题。selenium==2.48.0，phantomjs=2.0.1-development，Python 2.7.10键错误：139850984293008

from selenium import webdriver
driver = webdriver.PhantomJS('/Users/QuickSilver/Desktop/crawler/phantomjs-2.0.0-macosx/bin/phantomjs', port=631)