'Authors as a comma separated list or None.
In the comma separated list, commas in author names are replaced by | symbols'

def authors(self, index, index_is_id=False):

    if (not index_is_id):
        return self.data[index][2]
    try:
        return self.conn.get('SELECT    authors    FROM    meta    WHERE    id=?', (index,), all=False)
    except:
        pass
