title: Adding time in timefield
body: <p>I have a model which contains the following field</p>
  
  <pre><code>time_start = models.TimeField(u"Start Time", blank=False)
  </code></pre>
  
  <p>I want to add 1hr in start time and save it in a list</p>
  
  <p>Here is what I have tried</p>
  
  <pre><code>import datetime as dt
  start_time = Timeslot.objects.get(pk=1)
  start = start_time.time_start
  print(start)
  a = (start+dt.timedelta(hours=1)).time()
  print(a)
  li = []
  li.append(a)
  </code></pre>
  
  <p>but I am getting error</p>
  
  <pre><code>unsupported operand type(s) for +: 'datetime.time' and 'datetime.timedelta'
  </code></pre>