recurseM3U.py

#!/usr/bin/python
# -*- coding: utf8 -*-
# This script generates M3U playlists for MP3 files recursively found inside each
# subdirectory. Old M3U playlists are cleaned out previously
import os

# Grab all subdirectories within the current directory
search_sub ="find ./* -type d"

# Loop through all found subdirs
for subdir in os.popen (search_sub):
  # Strip LF at the end of the directory string
  subdir = subdir[:-1]
  # Add trailing / if missing
  if subdir[-1] != '/': subdir += '/'

  # Read all files from current directory
  files = os.listdir(subdir)

  # Generate name for new playlist including path
  playlist_name = subdir + 'playlist.m3u'

  # Generate empty playliste
  playlist = []

  # Only add MP3 files to playlist
  for n in files:
     if (n[-3:] == 'mp3') or (n[-3:] == 'MP3'): playlist.append(n+'\n')

     # Clean out old M3U files
     if (n[-3:] == 'm3u') or (n[-3:] == 'M3U'): os.remove (subdir +  n)


  # Sort MP3 playlist
  playlist.sort()

  # Save MP3 playlist to disk
  f = file (playlist_name, 'w')
  f.writelines (playlist)
  f.close()