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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 audio(self, audio, sample_rate, name=None, subdir=''):
 """Summary audio to listen on web browser. Args: audio (:class:`numpy.ndarray` or :class:`cupy.ndarray` or \ :class:`chainer.Variable`):
 sampled wave array. sample_rate (int):
 sampling rate. name (str):
 name of image. set as column name. when not setting, assigned ``'audio'`` + sequential number. subdir (str):
 sub-directory path of output. """


        from chainerui.report.audio_report import check_available
        if not check_available():
            return
        from chainerui.report.audio_report import report as _audio

        col_name = self.get_col_name(name, 'audio')
        out_dir, rel_out_dir = self.get_subdir(subdir)
        filename, _ = _audio(audio, sample_rate, out_dir, col_name)
        self.audios[col_name] = os.path.join(rel_out_dir, filename)

        self.count += 1