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It may be used in :pep:`484` typing to indicate arguments or return values that should behave as ORM-level attribute expressions. .. versionadded:: 2.0.0b4 r< Nr� r< r< r< r= r� � s r� c @ s� e Zd ZdZdZejr�edddd�dd��Zed dd d�d d��Zd dd d�dd�Ze ddd�dd��Z dddd�dd�Z ddd�dd�Z dS )�Mappedaj Represent an ORM mapped attribute on a mapped class. This class represents the complete descriptor interface for any class attribute that will have been :term:`instrumented` by the ORM :class:`_orm.Mapper` class. Provides appropriate information to type checkers such as pylance and mypy so that ORM-mapped attributes are correctly typed. 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