title: It is possible to round up integers using format?
body: <p>I'm trying to take a large integer, ie: 123123123 and format it with 3-digits of precision and commas.  Format can add the commas using:</p>
  
  <pre><code>'{:,}'.format(123123123)  # '123,123,123'
  </code></pre>
  
  <p>And specify precision for floating points:</p>
  
  <pre><code>'{0:.2f}'.format(3.141592) # '3.14'
  </code></pre>
  
  <p>But what if I want to do both?</p>
  
  <p>ie: </p>
  
  <pre><code>'{:,3d}'.format(123123123)  # ValueError
  </code></pre>
  
  <p>I would like to have it return: 123,000,000</p>