title: Add variable to request object in Django
body: <p>I'm trying to add the email variable to an request in Django.
  I've tried </p>
  
  <pre><code>request.session['email'] = my_email
  </code></pre>
  
  <p>and </p>
  
  <pre><code>request.email = my_email
  </code></pre>
  
  <p>and none of them seem to work. How can this be done?</p>