title: Installing twisted on Windows 10 64 bit under python 2.7
body: <p>Does anyone know how to do this. I have googled and the best that I could come up with was to do:</p>
  
  <p>pip install autobahn[twisted]</p>
  
  <p>when I do that I get this error in the command window</p>
  
  <pre><code>C:\Users\&lt;User Name&gt;\Desktop&gt;pip install autobahn[twisted]
  Collecting autobahn[twisted]
  c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\util\ssl_.py:318: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#snimissingwarning.
    SNIMissingWarning
  c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\util\ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
    InsecurePlatformWarning
    Downloading autobahn-18.3.1-py2.py3-none-any.whl (283kB)
      100% |################################| 286kB 1.0MB/s
  Collecting txaio&gt;=2.7.0 (from autobahn[twisted])
  c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\util\ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
    InsecurePlatformWarning
  c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\util\ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
    InsecurePlatformWarning
  Exception:
  Traceback (most recent call last):
    File "c:\python27\lib\site-packages\pip\basecommand.py", line 215, in main
      status = self.run(options, args)
    File "c:\python27\lib\site-packages\pip\commands\install.py", line 335, in run
      wb.build(autobuilding=True)
    File "c:\python27\lib\site-packages\pip\wheel.py", line 749, in build
      self.requirement_set.prepare_files(self.finder)
    File "c:\python27\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files
      ignore_dependencies=self.ignore_dependencies))
    File "c:\python27\lib\site-packages\pip\req\req_set.py", line 620, in _prepare_file
      session=self.session, hashes=hashes)
    File "c:\python27\lib\site-packages\pip\download.py", line 821, in unpack_url
      hashes=hashes
    File "c:\python27\lib\site-packages\pip\download.py", line 659, in unpack_http_url
      hashes)
    File "c:\python27\lib\site-packages\pip\download.py", line 853, in _download_http_url
      stream=True,
    File "c:\python27\lib\site-packages\pip\_vendor\requests\sessions.py", line 488, in get
      return self.request('GET', url, **kwargs)
    File "c:\python27\lib\site-packages\pip\download.py", line 386, in request
      return super(PipSession, self).request(method, url, *args, **kwargs)
    File "c:\python27\lib\site-packages\pip\_vendor\requests\sessions.py", line 475, in request
      resp = self.send(prep, **send_kwargs)
    File "c:\python27\lib\site-packages\pip\_vendor\requests\sessions.py", line 596, in send
      r = adapter.send(request, **kwargs)
    File "c:\python27\lib\site-packages\pip\_vendor\cachecontrol\adapter.py", line 47, in send
      resp = super(CacheControlAdapter, self).send(request, **kw)
    File "c:\python27\lib\site-packages\pip\_vendor\requests\adapters.py", line 497, in send
      raise SSLError(e, request=request)
  SSLError: [Errno 1] _ssl.c:504: error:1407742E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version
  </code></pre>
  
  <p>I have no idea how to fix the error</p>