title: Python need to request GitHub/API/repo/statistics/contributors url twice to get content
body: <p>I want to get particular repository's contributors and their total number of commits. I'm using Python 2.7 and Requests 2.7.0 library to request GitHub API url like: '<a href="https://api.github.com/repos/marcboeker/mongodb-utils/stats/contributors" rel="nofollow noreferrer">https://api.github.com/repos/marcboeker/mongodb-utils/stats/contributors</a>' (This is a random link, sorry marcboeker ^_^).</p>
  
  <p>However, the first time I request particular url, I got an empty dictionary response. The second time I request the same url, I can get a list that contains information I need. Here is my code:</p>
  
  <pre><code>import requests
  
  contributors_url = 'https://api.github.com/repos/marcboeker/mongodb-utils/stats/contributors'
  contributors = requests.get(contributors_url).json()
  print contributors
  </code></pre>
  
  <p>I also tried to use GitHub authentication and tried to use urllib2 library. I also tried in Python 3.4. But I got the same result.
  I need to get right result the first time I request the url, not second or third time. Since other GitHub API urls works fine, please explain why it's happening to 'contributors'.</p>
  
  <p><img src="https://i.stack.imgur.com/wfO2o.png" alt="First time result"></p>
  
  <p><img src="https://i.stack.imgur.com/0xGGA.png" alt="Second time result"></p>