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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 __cleanup(self):
 """Clip buffers that the top of our list that have been completely exhausted. """

# TODO: Test this.
        with self.__class__.__locker:

            while self.__read_buffer_index > 0:
                del self.__buffers[0]
                self.__read_buffer_index -= 1