new_contents: #!/usr/bin/python3
  
  import ID3
  import os
  
  mp3_extension = ".mp3"
  
  files = os.listdir('.')
  
  for f in files:
      if not os.path.isfile(f):
          files.remove(f)
      else:
          f = os.path.abspath(f)
  
  for f in files:
      print(f)
  
subject: Add base mp3-formatter.py