title: Python requests add extra headers to HTTP GET
body: <p>I am using python 2.7 requests module.</p>
  
  <p>I made this HTTP GET with the custom header below;</p>
  
  <pre><code>header ={
              "projectName": "zhikovapp",
              "Authorization": "Bearer HZCdsf="
          }
  response = requests.get(bl_url, headers = header)
  </code></pre>
  
  <p>The server returns a response that was not valid. On closer examination of the header that was sent, I discovered python requests module added some extra headers.</p>
  
  <pre><code>{
  'Accept-Encoding': 'gzip, deflate', 
  'projectName': 'zhikovapp',
  'Accept': '*/*', 
  'User-Agent': 'python-requests/2.11.1', 
  'Connection': 'keep-alive', 
  'Authorization': 'Bearer HZCdsf='
  }
  </code></pre>
  
  <p>The extra headers are <code>Accept-Encoding</code>, <code>Accept</code>, <code>Connection</code>, <code>User-Agent</code>. Is this a bug in python requests module? I am using requests ver 2.11.1</p>
  
  <p>How can I remove these extra headers added by python requests module?</p>