Create cue sheet for a list of id3-tagged audio files

cuer.py

#!/usr/bin/env python3

from sys import argv
from mediafile import MediaFile


def main():
    args = argv[1:]

    first_file = True
    lines = []

    for filename in args:
        tags = MediaFile(filename)
        cuefile = tags.albumartist + " - " + tags.album + ".cue"

        if first_file:
            lines.append('REM DATE ' + str(tags.year))
            lines.append('REM GENRE ' + tags.genre)
            lines.append('PERFORMER "' + tags.albumartist + '"')
            lines.append('TITLE "' + tags.album + '"')

            first_file = False

        lines.append('FILE "' + filename + '" WAVE')
        lines.append('\tTRACK ' + format(tags.track, '02') + " AUDIO")
        lines.append('\t\tTITLE "' + tags.title + '"')
        lines.append('\t\tPERFORMER "' + tags.artist + '"')
        lines.append('\t\tINDEX 01 00:00:00')

    cue = open(cuefile,"w+")
    cue.write("\n".join(lines))
    cue.close()


if __name__ == "__main__":
    main()

Thanks, @klizas! I rewrote it using Mutagen.