__init__.py 文件源码

def __init__(self, app=None, use_native_unicode=True, session_options=None, metadata=None):

        if session_options is None:
            session_options = {}

        session_options.setdefault('scopefunc', connection_stack.__ident_func__)
        self.use_native_unicode = use_native_unicode
        self.session = self.create_scoped_session(session_options)
        self.Model = self.make_declarative_base(metadata)
        self.Query = BaseQuery
        self._engine_lock = Lock()
        self.app = app
        _include_sqlalchemy(self)

        if app is not None:
            self.init_app(app)