title: Django's test client with multiple values for data keys
body: <p>Django's <a href="https://docs.djangoproject.com/en/1.4/topics/testing/#module-django.test.client" rel="noreferrer">test client</a> lets you perform <code>POST</code> requests and specify request data as a <code>dict</code>.</p>
  
  <p>However if I want to send data that mimics <code>&lt;select multiple&gt;</code> or <code>&lt;input type="checkbox"&gt;</code> fields, I need to send multiple values for a single key in the data <code>dict</code>.</p>
  
  <p>How do I do this?</p>