Given a bunch of MP3 files in directories, copies them into a file tree that is compatible with DFPlayer.

make-dfplayer-mp3-tree.py

#!/usr/bin/env python3

# Given a bunch of MP3 files in directories,
# copies them into a file tree that is
# compatible with DFPlayer.

import os
import shutil

src_dir = './sfx'
dst_dir = './sfx-sorted'
src_subdirs = {}
for root, subdirs, files in os.walk(src_dir):
  for subdir in subdirs:
    src_subdirs[subdir] = []
    continue
  relative_src_dir = os.path.relpath(root, src_dir)
  for file in files:
    src_subdirs[relative_src_dir].append(file)

dir_num = 1
for src_subdir, src_files in src_subdirs.items():
  file_num = 1
  dst_subdir = os.path.join(dst_dir, "%02d" % (dir_num))
  os.makedirs(dst_subdir)
  for src_file in src_files:
    src_fullpath = os.path.join(src_dir, src_subdir, src_file)
    dst_fullpath = os.path.join(dst_subdir, "%03d.mp3" % (file_num))
    file_num += 1
    print(src_fullpath, dst_fullpath)
    shutil.copyfile(src_fullpath, dst_fullpath)
  dir_num += 1