def pretty_date(time=False):
  """
  Get a datetime object or a int() Epoch timestamp and return a
  pretty string like 'an hour ago', 'Yesterday', '3 months ago',
  'just now', etc
  """
  from datetime import datetime
  now = datetime.now()
  if type(time) is int:
    diff = now - datetime.fromtimestamp(time)
  elif isinstance(time,datetime):
    diff = now - time
  elif not time:
    diff = now - now
  second_diff = diff.seconds
  day_diff = diff.days

  if day_diff < 0:
    return ''

  if day_diff == 0:
    if second_diff < 10:
      return "just now"
    if second_diff < 60:
      return str(second_diff) + " seconds ago"
    if second_diff < 120:
      return "a minute ago"
    if second_diff < 3600:
      return str(second_diff / 60) + " minutes ago"
    if second_diff < 7200:
      return "an hour ago"
    if second_diff < 86400:
                       return str(second_diff / 3600) + " hours ago"
  if day_diff == 1:
    return "Yesterday"
  if day_diff < 7:
    return str(day_diff) + " days ago"
  if day_diff < 31:
    return str(day_diff / 7) + " weeks ago"
  if day_diff < 365:
    return str(day_diff / 30) + " months ago"
  return str(day_diff / 365) + " years ago"