re-tag mp3

eye.py

import eyed3
import os
import glob; 


for filename in glob.glob('/dir/to/mp3/**/**/*.mp3'):
    try:
        print(filename)
        audiofile = eyed3.load(filename)
        audiofile.tag.setTextFrame('TCOM', audiofile.tag.album_artist or audiofile.tag.artist)
        print(audiofile.tag.getTextFrame('TCOM'));
        audiofile.tag.save()
    except:
        print("Exception")