"T`- @sGdddZdS)c@sXeZdZdZdZddZeddddZedd d d Z dS) CloudInitPickleMixinaScaffolding 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.) cCs&|jj}t|j|d<|S)aLPersist 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__copytyper)selfstater 7/usr/lib/python3/dist-packages/cloudinit/persistence.py __getstate__s z!CloudInitPickleMixin.__getstate__N)rreturncCs3|jdd}|jj||j|dS)aERestore 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. rrN)poprupdate _unpickle)rrversionr r r __setstate__'s z!CloudInitPickleMixin.__setstate__)ci_pkl_versionr cCsdS)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 )rrr r r r8szCloudInitPickleMixin._unpickle) __name__ __module__ __qualname____doc__rr dictrintrr r r r rs  rN)rr r r r s