title: Get date from week number
body: <p>Please what's wrong with my code: </p>
  
  <pre><code>import datetime
  d = "2013-W26"
  r = datetime.datetime.strptime(d, "%Y-W%W")
  print(r)
  </code></pre>
  
  <p>Display "2013-01-01 00:00:00", Thanks.</p>