title: Django - how to pass more than one primary key to the view
body: <p>I need to write a view to delete multiple objects in one go.
  I have modified the HTML template, put checkboxes to select which objects (users) to delete and a button to delete them, but of course you need a view to perform the task.</p>
  
  <p>When you have one item to select at a time, you pass its primary key to the view through the url, how can I extend this to pass more than one primary key?</p>