问Ubuntu14.04上的Scrapy安装

EN

Traceback (most recent call last):
  File "/usr/local/bin/scrapy", line 7, in <module>
    from scrapy.cmdline import execute
  File "/usr/local/lib/python2.7/dist-packages/scrapy/cmdline.py", line 9, 
in <module>
    from scrapy.crawler import CrawlerProcess
  File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 7, 
in <module>
    from twisted.internet import reactor, defer
  File "/usr/local/lib/python2.7/dist-packages/twisted/internet/reactor.py", 
line 38, in <module>
    from twisted.internet import default
  File "/usr/local/lib/python2.7/dist-packages/twisted/internet/default.py", 
line 56, in <module>
    install = _getInstallFunction(platform)
  File "/usr/local/lib/python2.7/dist-packages/twisted/internet/default.py", 
line 44, in _getInstallFunction
    from twisted.internet.epollreactor import install
  File "/usr/local/lib/python2.7/dist-
packages/twisted/internet/epollreactor.py", line 24, in <module>
    from twisted.internet import posixbase
  File "/usr/local/lib/python2.7/dist-
packages/twisted/internet/posixbase.py", line 18, in <module>
    from twisted.internet import error, udp, tcp
  File "/usr/local/lib/python2.7/dist-packages/twisted/internet/tcp.py", 
line 28, in <module>
    from twisted.internet._newtls import (
  File "/usr/local/lib/python2.7/dist-packages/twisted/internet/_newtls.py", 
line 21, in <module>
   from twisted.protocols.tls import TLSMemoryBIOFactory, 
TLSMemoryBIOProtocol
  File "/usr/local/lib/python2.7/dist-packages/twisted/protocols/tls.py", 
line 63, in <module>
    from twisted.internet._sslverify import _setAcceptableProtocols
  File "/usr/local/lib/python2.7/dist-
packages/twisted/internet/_sslverify.py", line 38, in <module>
    TLSVersion.TLSv1_1: SSL.OP_NO_TLSv1_1,
AttributeError: 'module' object has no attribute 'OP_NO_TLSv1_1'