title: Replicate curl negotiate connection (using kerberos auth) in Python
body: <p>I'd like to replicate the following curl command in Python.</p>
  
  <pre><code>curl -u : --negotiate -k https://example.com/authenticate
  </code></pre>
  
  <p>I followed this pycurl example here and it worked fine
  <a href="http://www.deplication.net/2014/02/curl-with-kerberos-authentication.html" rel="noreferrer">http://www.deplication.net/2014/02/curl-with-kerberos-authentication.html</a></p>
  
  <pre><code>curl = pycurl.Curl()
  curl.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_GSSNEGOTIATE)
  curl.setopt(pycurl.USERPWD, ':')
  curl.setopt(pycurl.URL, 'https://example.com/authenticate'
  curl.perform()
  </code></pre>
  
  <p>Is there a way to do it with Python requests module?</p>
  
  <p>Thanks!!</p>