title: Get week number using date in python
body: <p>Date is  <code>datetime.date(2013, 12, 30)</code></p>
  
  <p>I am trying to get week number using </p>
  
  <pre><code>import datetime
  datetime.date(2013, 12, 30).isocalendar()[1]
  </code></pre>
  
  <p>I am getting output as , </p>
  
  <pre><code>1
  </code></pre>
  
  <p>Why i am not getting week number of last year , instead i am getting week number of current year?</p>
  
  <p>Whats wrong i am doing here ?</p>