title: Jira python calculate time
body: <p>I am trying to calculate the time from the issue is created and until it is resolved. With these fields:</p>
  
  <pre><code>creation_time = issue.fields.created
  resolved_time = issue.fields.resolutiondate
  </code></pre>
  
  <p>Output when I print:</p>
  
  <pre><code>Creation: 2016-06-09T14:37:05.000+0200 Resolved: 2016-06-10T10:53:12.000+0200
  </code></pre>
  
  <p>Is there anyway I can minus the resolution date and time with the creation date and time to find how much time is spent on a issue?</p>