How to use the tinytag.tinytag.Wave function in tinytag

def _get_parser_for_filename(cls, filename, exception=False):
        mapping = {
            ('.mp3',): ID3,
            ('.oga', '.ogg', '.opus'): Ogg,
            ('.wav',): Wave,
            ('.flac',): Flac,
            ('.wma',): Wma,
            ('.m4b', '.m4a', '.mp4'): MP4,
        }
        for fileextension, tagclass in mapping.items():
            if filename.lower().endswith(fileextension):
                return tagclass
        if exception:
            raise TinyTagException('No tag reader found to support filetype! ')

def get(cls, filename, tags=True, duration=True):
        parser_class = None
        size = os.path.getsize(filename)
        if not size > 0:
            return TinyTag(None, 0)
        if cls == TinyTag:
            """choose which tag reader should be used by file extension"""
            mapping = {
                ('.mp3',): ID3,
                ('.oga', '.ogg', '.opus'): Ogg,
                ('.wav'): Wave,
                ('.flac'): Flac,
            }
            for fileextension, tagclass in mapping.items():
                if filename.lower().endswith(fileextension):
                    parser_class = tagclass
        else:
            # use class on which the method was invoked as parser
            parser_class = cls
        if parser_class is None:
            raise LookupError('No tag reader found to support filetype! ')
        with open(filename, 'rb') as af:
            tag = parser_class(af, size)
            tag.load(tags=tags, duration=duration)
            return tag