def __save(self): return save("account.dat", AccountDao.__accounts)
def __save(self): return save("user.dat", UserDao.__users)
def __save(self): return save("return_item.dat", ReturnItemDao.__returns)
def __save(self): return save("order.dat", OrderDao.__odaoers)
def __save(self): return save('item.dat', ItemDao.__items)
def __save(self): return save("user.dat", LotteryDao.__lottery)