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August 15, 2005

Random playlist

I'm playing around with my MP3 reader and python. Python's a good language for handling lists and dictionaries and so forth, but I don't know it yet. So it took me some time to figure out where the pieces were for a short program that generates a random playlist of the size that fits onto my MP3 reader.

import glob
import os.path
import random
import shutil


MUSIC_SRC = "/home/mark/music/*/*/*.[mw][pm][3a]"

MAX_SIZE  = 516538368L  # Available blocks on my MP3 player when empty

MUSIC_DST = "/media/usbdisk/"



files = glob.glob(MUSIC_SRC)



list = {}

for filename in files:

        list[filename] = os.path.getsize(filename)



playlist = []

totalsize = 0

maxsize = MAX_SIZE

while files:

        song = random.choice(files)

        files.remove(song)

        totalsize += list[song]

        if maxsize > totalsize:

                playlist.append(song)



number = 1

for song in playlist:

        copyname = MUSIC_DST + str(number).zfill(3) + " - " + os.path.basename(song)

        shutil.copyfile(song, copyname)

        number = number + 1

I've had one problem with this:

Traceback (most recent call last):
  File "playlist.py", line 29, in ?
    shutil.copyfile(song, copyname)
  File "/usr/lib/python2.4/shutil.py", line 48, in copyfile
    fdst = open(dst, 'wb')
IOError: invalid mode: wb

Huh? Forget it. I'm going to bed.

Posted by Mark at August 15, 2005 10:58 PM