title: How to reverse order of keys in python dict?
body: <p>This is my code :</p>
  
  <pre><code>a = {0:'000000',1:'11111',3:'333333',4:'444444'}
  
  for i in a:
      print i
  </code></pre>
  
  <p>it shows:</p>
  
  <pre><code>0
  1
  3
  4
  </code></pre>
  
  <p>but I want it to show:</p>
  
  <pre><code>4
  3
  1
  0
  </code></pre>
  
  <p>so, what can I do?</p>