@dingyaguang117_!)session_factory and :code:make_session_factory in favor of
the new :code:SQLAlchemy instancedeclarative_base in favor of the new :code:SQLAlchemy.Model
property__bind_key__UPGRADING.rst_ for help with upgrading.]SessionMixin arguments directly to :code:create_engineblackSessionMixin to suport :code:self.session__call__ pattern on :code:declarative_baseuse_native_unicode only to PostgreSQL connectionsdefault_max_workers default value to CPU countsetup.pyuse_native_unicode argument