title: python function .json(): No JSON object could be decoded
body: <p>the function looks like this:</p>
  
  <pre><code>import requests
  import json
  def parse(s):
      r = requests.post('http://166.111.139.15:9000/?properties%3d%7b%22annotators%22%3a%22tokenize%2cssplit%2cpos%2clemma%2cparse%22%2c%22outputFormat%22%3a%22json%22%7d%0a', data=s)
      return r.json()
  
  print parse("I am a student")
  </code></pre>
  
  <p>And when I use it in Django, the web page shows:
  "No JSON object could be decoded".Why?</p>