Estou tentando fazer uma solicitação para uma API usando Python, mas estou recebendo umErro SSL. Eu procurei em todos os lugares, mas não consigo encontrar uma solução.

Estas são as versões que eu instalei no meu ambiente virtual:

Python 2.7.12 (v2.7.12:d33e0cf91556, Jun 26 2016, 12:10:39) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
>>> ssl.OPENSSL_VERSION
'OpenSSL 0.9.8zg 14 July 2015'

Estou tentando usar o código que encontrei noeste blog:

from requests.adapters import HTTPAdapter
from requests.packages.urllib3.poolmanager import PoolManager
import ssl
import requests

class SSLAdapter(HTTPAdapter):
    '''An HTTPS Transport Adapter that uses an arbitrary SSL version.'''
    def __init__(self, ssl_version=None, **kwargs):
        self.ssl_version = ssl_version

        super(SSLAdapter, self).__init__(**kwargs)

    def init_poolmanager(self, connections, maxsize, block=False):
        self.poolmanager = PoolManager(num_pools=connections,
                                       maxsize=maxsize,
                                       block=block,
                                       ssl_version=self.ssl_version)

if __name__ == '__main__':
    url = 'https://msesandbox.cisco.com:8081/api/location/v2/clients?sortBy=lastLocatedTime:DESC'
    s = requests.Session()
    s.mount("https://", SSLAdapter(ssl.PROTOCOL_SSLv2))
    response = s.get(url) #line that trigger the mistake.
    print (response)

Esta é a saída:

Traceback (most recent call last):
  File "/path/to/file", line 23, in <module>
    response = s.get(url)
  File "/Users/rafacarv/Environments/python2_7_12_cmx/venv/lib/python2.7/site-packages/requests/sessions.py", line 487, in get
    return self.request('GET', url, **kwargs)
  File "/Users/rafacarv/Environments/python2_7_12_cmx/venv/lib/python2.7/site-packages/requests/sessions.py", line 475, in request
    resp = self.send(prep, **send_kwargs)
  File "/Users/rafacarv/Environments/python2_7_12_cmx/venv/lib/python2.7/site-packages/requests/sessions.py", line 585, in send
    r = adapter.send(request, **kwargs)
  File "/Users/rafacarv/Environments/python2_7_12_cmx/venv/lib/python2.7/site-packages/requests/adapters.py", line 477, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590)

Eu também tentei usar a sugestão que encontrei nesse outroPergunta, questão, que consiste em usar oorders_toolbelt pacote, mas não teve sorte.

Como posso consertar isso?