code: def humanize_duration(duration):
      
      days = duration.days
      hours = int(duration.seconds / 3600)
      minutes = int(duration.seconds % 3600 / 60)
      seconds = int(duration.seconds % 3600 % 60)
  
      parts = []
      if days > 0:
          parts.append(u'%s %s' % (days, pluralize(days, _('day,days'))))
  
      if hours > 0:
          parts.append(u'%s %s' % (hours, pluralize(hours, _('hour,hours'))))
  
      if minutes > 0:
          parts.append(u'%s %s' % (minutes, pluralize(minutes, _('minute,minutes'))))
  
      if seconds > 0:
          parts.append(u'%s %s' % (seconds, pluralize(seconds, _('second,seconds'))))
  
      return ', '.join(parts) if len(parts) != 0 else _('< 1 second')
docs: Returns a humanized string representing time difference
  
      For example: 2 days 1 hour 25 minutes 10 seconds