title: Determine month before date - Python
body: <p>In python, how can I determine the month before the following date:</p>
  
  <pre><code>t = datetime.date(2014, 01, 03)
  </code></pre>
  
  <p>This is so that the result would be:</p>
  
  <pre><code>2013-12-03
  </code></pre>