<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def reverse(self):
 """ Reverse the audio data. :raises: :class:`~aeneas.audiofile.AudioFileNotInitializedError`: if the audio file is not initialized yet .. versionadded:: 1.2.0 """

        if self.__samples is None:
            if self.file_path is None:
                self.log_exc(u"AudioFile object not initialized", None, True, AudioFileNotInitializedError)
            else:
                self.read_samples_from_file()
        self.log(u"Reversing...")
        self.__samples[0:self.__samples_length] = numpy.flipud(self.__samples[0:self.__samples_length])
        self.log(u"Reversing... done")