title: docker-py getarchive destination folder
body: <p>I am following the instructions given in this link for get_archive()<a href="https://docker-py.readthedocs.io/en/stable/api/#get_archive" rel="nofollow">link</a>
   but instead of creating my container i was trying to use already running container in my case "docker-nginx" as an input string and also the destination folder where my content was residing in nginx server as '/usr/share/nginx/html' and got my output for the stat of the folder too i want to know how can i give the destination folder in this function if not where is my extrated tar file ? i was not able to figure out where my file was downloaded </p>
  
  <p>here is my code
  <code>strm,stat=c.get_archive(container_name,'/usr/share/nginx/html')</code></p>
  
  <p>my output for print(strm) is <code>&lt;requests.packages.urllib3.response.HTTPResponse object at 0x7fe3581e1250&gt;
  </code>
  my output for print(stat) is <code>{u'linkTarget': u'', u'mode': 2147484157, u'mtime': u'2016-10-05T09:37:17.928258508-05:00', u'name': u'html', u'size': 4096}</code></p>