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a '�Dg � @ s G d d� d�Z dS )c @ s< e Zd ZdZdZdd� Zedd�dd�Zedd �d d �Z dS ) �CloudInitPickleMixina� Scaffolding for versioning of pickles. This class implements ``__getstate__`` and ``__setstate__`` to provide lightweight versioning of the pickles that are generated for classes which use it. Versioning is done at the class level. The current version of a class's pickle should be set in the class variable ``_ci_pkl_version``, as an int. If not overridden, it will default to 0. On unpickle, the object's state will be restored and then ``self._unpickle`` is called with the version of the stored pickle as the only argument: this is where classes should implement any deserialization fixes they require. (If the stored pickle has no version, 0 is passed.) � c C s | j �� }t| �j|d< |S )aL Persist instance state, adding a pickle version attribute. This adds a ``_ci_pkl_version`` attribute to ``self.__dict__`` and returns that for serialisation. The attribute is stripped out in ``__setstate__`` on unpickle. The value of ``_ci_pkl_version`` is ``type(self)._ci_pkl_version``. �_ci_pkl_version)�__dict__�copy�typer )�self�state� r �9/usr/lib/python3.9/site-packages/cloudinit/persistence.py� __getstate__ s z!CloudInitPickleMixin.__getstate__N)r �returnc C s& |� dd�}| j�|� | �|� dS )aE Restore instance state and handle missing attributes on upgrade. This will be called when an instance of this class is unpickled; the previous instance's ``__dict__`` is passed as ``state``. This method removes the pickle version from the stored state, restores the remaining state into the current instance, and then calls ``self._unpickle`` with the version (or 0, if no version is found in the stored state). See https://docs.python.org/3/library/pickle.html#object.__setstate__ for further background. r r N)�popr �update� _unpickle)r r �versionr r r � __setstate__' s z!CloudInitPickleMixin.__setstate__)�ci_pkl_versionr c C s dS )a> Perform any deserialization fixes required. By default, this does nothing. Classes using this mixin should override this method if they have fixes they need to apply. ``ci_pkl_version`` will be the version stored in the pickle for this object, or 0 if no version is present. Nr )r r r r r r 8 s z CloudInitPickleMixin._unpickle) �__name__� __module__� __qualname__�__doc__r r �dictr �intr r r r r r s r N)r r r r r �<module> �