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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _initialized(self, partitioner):
 """Store the partitioner and reset the internal state. Now that we successfully got an actual :class:`kazoo.recipe.partitioner.SetPartitioner` object, we store it and reset our internal ``_state`` to ``None``, causing the ``state`` property to defer to the partitioner's state. """

        self._partitioner = partitioner
        self._thimble = Thimble(self.reactor, self.pool,
                                partitioner, _blocking_partitioner_methods)
        self._state = None