gistfile1.py

import re, os
path = r'C:\Home\OldMusic'

def get_files_out_of_subdirs(path):
  base_level_len = len(path.split(os.path.sep))
  for n, d, files in os.walk(path):
    n = n.split(os.path.sep)
    top_level = (len(n) == base_level_len+1)
    if top_level: top_level_dir = n
    if not top_level:
      for file in files:
        if re.search('(?i)\.(?:mp3|m4a)$', file):
          old_path = os.path.sep.join(n + [file])
          new_path = os.path.sep.join(top_level_dir + [file])
          try:
            os.rename(old_path, new_path)
          except Exception, e: # filename conflict, write like 'filename (2).mp3'
            if 'Error 183' in str(e):
              filename, ext = os.path.splitext(file)
              version = 2
              new_path = os.path.sep.join(top_level_dir + ['%s (%s)%s' % (filename, version, ext)])
              path_exists = os.path.exists(new_path)
              while path_exists:
                version += 1
                new_path = os.path.sep.join(top_level_dir + ['%s (%s)%s' % (filename, version, ext)])
                path_exists = os.path.exists(new_path)
              os.rename(old_path, new_path)
              print new_path
    ls = os.listdir(os.path.sep.join(n))
    if len(ls) == 0:
      os.rmdir(os.path.sep.join(n))

def put_artist_name_on_files(path):
  base_level_len = len(path.split(os.path.sep))
  for n, d, files in os.walk(path):
    n = n.split(os.path.sep)
    if len(n) > base_level_len-1:
      artist_name = n[base_level_len]
      for file in files:
        if re.search('(?i)\.(?:mp3|m4a)$', file):
          if not file.lower().startswith(artist_name.lower()):
            old_path = os.path.sep.join(n + [file])
            new_path = os.path.sep.join(n + ['%s - %s' % (artist_name, file)])
            os.rename(old_path, new_path)