title: Python evaluate datetimes when one datetime is None
body: <p>I'm wondering how a None datetime is evaluated in Python 2.7.</p>
  
  <p>Specifically;</p>
  
  <p><code>trial_exp_date &lt; datetime.utcnow() #trial_exp_date = None</code></p>
  
  <p>If a user was never on a trial then the trial_exp_date will be None, in that case I'm wondering if the above evaluation will evaluate to True of False.</p>