title: Localizing Epoch Time with pytz in Python
body: <p>Im working on converting epoch timestamps to dates in different timezones with pytz.  What I am trying to do is create a DateTime object that accepts an Olson database timezone and an epoch time and returns a localized datetime object.  Eventually I need to answer questions like "What hour was it in New York at epoch time 1350663248?"</p>
  
  <p>Something is not working correctly here:</p>
  
  <pre><code>import datetime, pytz, time
  
  class DateTime:
      def __init__(self, timezone, epoch):
          self.timezone = timezone
          self.epoch = epoch
          timezoneobject = pytz.timezone(timezone)
          datetimeobject = datetime.datetime.fromtimestamp( self.epoch )
          self.datetime = timezoneobject.localize(datetimeobject)
  
      def hour(self):
          return self.datetime.hour
  
  if __name__=='__main__':
      epoch = time.time()
      dt = DateTime('America/Los_Angeles',epoch)
      print dt.datetime.hour
      dt = DateTime('America/New_York',epoch)
      print dt.datetime.hour
  </code></pre>
  
  <p>This prints the same hour, whereas one should be 3 or so hours ahead.  Whats going wrong here?  I'm a total Python beginner, any help is appreciated!</p>