code:

import os
import sys


def listfiles(start):
    for dirname, dirnames, filenames in os.walk(start):
        directory = ''
        for filename in filenames:
            if filename is 'thumbs.db':
                continue
            directory += filename + ';'
        directory = directory.rstrip(';')
        print directory


def main():
    try:
        listfiles(sys.argv[1])
    except IndexError:
        print 'usage: python listfile.py C:\path\\to\\folder'


if __name__ == '__main__':
    main()