reorganize.py

#!/usr/bin/env python

import os
import shutil

count = 0

for filename in os.listdir('.'):
    if filename.endswith('.txt') and os.path.isfile(filename):
	destDir = 'AAA%d' % (count / 500 + 1)
	if count % 500 == 0:
	    os.mkdir(destDir)
	shutil.move(filename, destDir)
	count += 1
        if count % 1000 == 0:
            print '%d files have been moved.' % count