import os
import shutil
import sys 

indir = sys.argv[1]

filenames = []

for filename in os.listdir(indir):
    if filename.lower().endswith(".mp3"): 
		filenames.append(filename)
filenames.sort()

for fn in filenames:
    # opent file
    fin = open(os.path.join(indir, fn), 'rb')
    fc = fin.read() # read it
    fin.close()
    
	# open for write, it will change date
    fo = open(os.path.join(indir, fn), 'wb')
    fo.write(fc) #write
    fo.close()