class AccountQuerySet(models.query.QuerySet):
    def pending(self): return self.filter(type=self.model.STATUS.pending)
    def active(self): return self.filter(type=self.model.STATUS.active)
    def closed(self): return self.filter(type=self.model.STATUS.closed)
    def locked(self): return self.filter(type=self.model.STATUS.locked)