title: python string format() with dict with integer keys
body: <p>I would like to use Python string's <code>format()</code> to act as a quick and dirty template. However, the <code>dict</code> that I would like to use has keys which are (string representations) of integers. a simplified example follows:</p>
  
  <pre><code>s = 'hello there {5}'
  d = {'5': 'you'}
  s.format(**d)
  </code></pre>
  
  <p>the above code throws the following error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  IndexError: tuple index out of range
  </code></pre>
  
  <p>is it possible to do the above?</p>