title: Formatting numbers so they align on the decimal point
body: <p>In Python, I need to format numbers so they align on the decimal point, like so:</p>
  <pre class="lang-none prettyprint-override"><code>  4.8
   49.723
  456.781
  -72.18
    5
   13
  </code></pre>
  <p>What is the most straightforward way to do this?</p>