title: django check within template if the current url has a particular word in it
body: <p>Similar to this question:</p>
  
  <p><a href="https://stackoverflow.com/q/7462398/1061426">Django template, if tag based on current URL value</a></p>
  
  <p>only I want to check if the url has a word in it - you know, like</p>
  
  <pre><code>if a.find(b) == -1
  </code></pre>
  
  <p>how can i do this? </p>