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편집 파일: inspection.cpython-37.pyc
B ��4]� � @ sD d Z ddlmZ ddlmZ e�e�Zd dd�Zdd� Zd d � Z d S ) a The inspection module provides the :func:`.inspect` function, which delivers runtime information about a wide variety of SQLAlchemy objects, both within the Core as well as the ORM. The :func:`.inspect` function is the entry point to SQLAlchemy's public API for viewing the configuration and construction of in-memory objects. Depending on the type of object passed to :func:`.inspect`, the return value will either be a related object which provides a known interface, or in many cases it will return the object itself. The rationale for :func:`.inspect` is twofold. One is that it replaces the need to be aware of a large variety of "information getting" functions in SQLAlchemy, such as :meth:`.Inspector.from_engine`, :func:`.orm.attributes.instance_state`, :func:`.orm.class_mapper`, and others. The other is that the return value of :func:`.inspect` is guaranteed to obey a documented API, thus allowing third party tools which build on top of SQLAlchemy configurations to be constructed in a forwards-compatible way. � )�exc)�utilTc C st t | �}xD|jD ]2}|tkrt| }|dkr0| S || �}|dk rP qW d }}|rp|dksb|dkrpt�d| ��|S )a� Produce an inspection object for the given target. The returned value in some cases may be the same object as the one given, such as if a :class:`.Mapper` object is passed. In other cases, it will be an instance of the registered inspection type for the given object, such as if an :class:`.engine.Engine` is passed, an :class:`.Inspector` object is returned. :param subject: the subject to be inspected. :param raiseerr: When ``True``, if the given subject does not correspond to a known SQLAlchemy inspected type, :class:`sqlalchemy.exc.NoInspectionAvailable` is raised. If ``False``, ``None`` is returned. TNz7No inspection system is available for object of type %s)�type�__mro__� _registrarsr ZNoInspectionAvailable)ZsubjectZraiseerr�type_�clsZreg�ret� r �H/opt/alt/python37/lib64/python3.7/site-packages/sqlalchemy/inspection.py�inspect& s r c s � fdd�}|S )Nc s. x(� D ] }|t kr td| ��| t |< qW | S )Nz Type %s is already registered)r �AssertionError)Z fn_or_clsr )�typesr r �decorateN s z_inspects.<locals>.decorater )r r r )r r � _inspectsM s r c C s t | �d� | S )NT)r )r r r r �_self_inspectsZ s r N)T) �__doc__� r r � defaultdict�listr r r r r r r r �<module> s '