創建數據庫這一塊一直出現這個問題,一直不知道要怎么解決？有會的大神可以幫忙以下嗎

D:\python\imooc_lagou\venv\Scripts\python.exe D:/python/imooc_lagou/create_lagou_tables.py

Traceback (most recent call last):

? File "D:/python/imooc_lagou/create_lagou_tables.py", line 17, in <module>

? ? class Lagoutables(Base):

? File "D:\python\imooc_lagou\venv\lib\site-packages\sqlalchemy\ext\declarative\api.py", line 75, in __init__

? ? _as_declarative(cls, classname, cls.__dict__)

? File "D:\python\imooc_lagou\venv\lib\site-packages\sqlalchemy\ext\declarative\base.py", line 131, in _as_declarative

? ? _MapperConfig.setup_mapping(cls, classname, dict_)

? File "D:\python\imooc_lagou\venv\lib\site-packages\sqlalchemy\ext\declarative\base.py", line 160, in setup_mapping

? ? cfg_cls(cls_, classname, dict_)

? File "D:\python\imooc_lagou\venv\lib\site-packages\sqlalchemy\ext\declarative\base.py", line 192, in __init__

? ? self._setup_inheritance()

? File "D:\python\imooc_lagou\venv\lib\site-packages\sqlalchemy\ext\declarative\base.py", line 589, in _setup_inheritance

? ? "table-mapped class." % cls

sqlalchemy.exc.InvalidRequestError: Class <class '__main__.Lagoutables'> does not have a __table__ or __tablename__ specified and does not inherit from an existing table-mapped class.