title: Django - How to get the length of the array through GET request?
body: <p>I have a http get request that has an array, particularly: </p>
  
  <pre><code>[29/Sep/2014 16:04:47] "GET /webapp/ajax_retreiveServerSideUsernames/?draw=1&amp;columns%5B0%5D%5Bdata%5D=0&amp;columns%5B0%5D%5
  Bname%5D=&amp;columns%5B0%5D%5Bsearchable%5D=true&amp;columns%5B0%5D%5Borderable%5D=true&amp;columns%5B0%5D%5Bsearch%5D%5Bvalue%5D=&amp;
  columns%5B0%5D%5Bsearch%5D%5Bregex%5D=false&amp;order%5B0%5D%5Bcolumn%5D=0&amp;order%5B0%5D%5Bdir%5D=asc&amp;start=0&amp;length=10&amp;searc
  h%5Bvalue%5D=&amp;search%5Bregex%5D=false&amp;csrfmiddlewaretoken=Something&amp;_=1412028280135 HTTP/1.1" 200
   1436
  </code></pre>
  
  <p>My question is that how do I get the "length" of a particular array in a GET request?</p>
  
  <p>For example the array order:<code>order[i][column]</code>. </p>
  
  <p>However, there may be cases with unkown array size.</p>
  
  <p>If I know that i = 0, then I can use <code>request.get['order[0][column]']</code> to get the content of the first array's column data.</p>
  
  <p>I tried to use <code>request.GET.getlist('order[column]')</code> or <code>request.GET.getlist('order')</code> with no avail.</p>