title: What is the difference between r'' and r'^$' in regex for Django URLs?
body: <p>I have a urls.py file that has a line like this:</p>
  
  <pre><code>urlpatterns = patterns('', 
      url(r'', include('my_module.urls'))
  )
  </code></pre>
  
  <p>Why is it that when I change the middle line to <code>url(r'^$', include('my_module.urls'))</code> it doesn't work?</p>
  
  <p>Isn't this regex for the same (blank) value?</p>