title: Sort python dictionary by date key
body: <p>In the main dictionary, the date was a value. There were data with same date. So then I took the date and grouped it by creating a 2 dimensional dict where date is the key.</p>
  
  <pre><code>data = {
      "01-01-2015" : "some data",
      "05-05-2015" : "some data",
      "03-04-2015" : "some data"
  }
  </code></pre>
  
  <p>Now I want to sort it by the date descending so that it will look like this:</p>
  
  <pre><code>data = {
      "05-05-2015" : "some data",
      "03-04-2015" : "some data",
      "01-01-2015" : "some data"
  }
  </code></pre>
  
  <p>How can I achieve that?<br>
  <strong>I am using python 2.6</strong></p>