urllib2: urlopen error _ssl.c:320: Invalid SSL protocol variant specified.

 urllib2.URLError: <urlopen error _ssl.c:320: Invalid SSL protocol variant specified.>

  File "/usr/local/lib/python2.7/dist-packages/suds/client.py", line 521, in __call__
    return client.invoke(args, kwargs)
  File "/usr/local/lib/python2.7/dist-packages/suds/client.py", line 761, in invoke
    return self.send(_parse(msg))
  File "/usr/local/lib/python2.7/dist-packages/suds/client.py", line 613, in send
    reply = self.options.transport.send(request)
  File "/usr/local/lib/python2.7/dist-packages/suds/transport/http.py", line 82, in send
    fp = self.u2open(u2request)
  File "http_conultaCnpj.py", line 224, in u2open
    return url.open(u2request, timeout=tm)
  File "/usr/lib/python2.7/urllib2.py", line 404, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 422, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "http_conultaCnpj.py", line 196, in https_open
    return self.do_open(self.getConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error _ssl.c:320: Invalid SSL protocol variant specified.>
Exception AttributeError: "'NoneType' object has no attribute 'path'" in <function _remove at 0x7f0020003668> ignored

Este erro acontece, devido a isto:

     self._finalizar_cripto()

    def _finalizar_cripto(self):
        xmlsec.cryptoShutdown()
        xmlsec.cryptoAppShutdown()
        xmlsec.shutdown()

        libxml2.cleanupParser()