
    ܍~c-
                           G d  d          Z dS )c                   <    e Zd ZdZdZd ZdeddfdZdeddfd	Z	dS )
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 overriden, 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                 f    | 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states     7/usr/lib/python3/dist-packages/cloudinit/persistence.py__getstate__z!CloudInitPickleMixin.__getstate__   s0     ""$$#'::#=     r   returnNc                     |                     dd          }| j                            |           |                     |           dS )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   versions      r   __setstate__z!CloudInitPickleMixin.__setstate__'   sF     ))-q11U###wr   ci_pkl_versionc                     dS )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.
        N )r
   r   s     r   r   zCloudInitPickleMixin._unpickle8   s      r   )
__name__
__module____qualname____doc__r   r   dictr   intr   r   r   r   r   r      sx          O   $  4        "       r   r   N)r   r   r   r   <module>r      s7   8 8 8 8 8 8 8 8 8 8r   