music.py

class Music(object):

    metadata_info = (
        ('title', 3, 33),
        ('artist', 33, 63),
        ('album', 63, 93),
        ('year', 93, 97),
        ('comment', 97, 126),
    )

    def __init__(self, filepath):
        self.filepath = filepath
        self.meta = {}

    def parse(self):
        try:
            with open(self.filepath, 'rb') as msfile:
                msfile.seek(-128, 2)
                metadata = msfile.read(128)
                print metadata

            if metadata[:3] == 'TAG':
                for tag, start, end in self.metadata_info:
                    self.meta[tag] = self._parse_string(metadata[start : end])
                    self.meta['genre'] = ord(metadata[127 : 128])

        except IOError:
            return False

    def _parse_string(self, data):
        return data.replace('\00', '').strip()