economist mp3 renamer

import os
import sys
import shutil

if len(sys.argv) != 2:
    print 'Usage: python economist_rename.py ~/path/to/mp3s'
    sys.exit(0)
mp3_path = sys.argv[1]
if not mp3_path[-1:] == '/':
    mp3_path += '/' 
print 'Renaming mp3s in ' + mp3_path

mp3s = os.listdir(mp3_path)
for file in mp3s:
    if file[:2] == '00':
        shutil.move(mp3_path + file, mp3_path + file[1:])
        print 'renaming ' + file