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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 save(self, path):
 """Save the sound to a wave file at the given path. Uses :attr:`Waveform.save`, but if the path ends in a folder instead of a file, the filename is based on the project's :attr:`name`. :returns: Path to the saved file. """

        (folder, filename) = os.path.split(path)
        if not filename:
            filename = _clean_filename(self.name)
            path = os.path.join(folder, filename)
        return self.waveform.save(path)