prin_dirs

from __future__ import print_function
import os
import sys

def print_dir(directory, output):
    for (root, dirs, files) in os.walk(directory):
        for d in dirs:
            print(os.path.join(root, d), file=output)
        for f in files:
            print(os.path.join(root, f), file=output)

if __name__ == '__main__':
    if len(sys.argv) != 3:
        print("Usage: {} directory output".format(sys.argv[0]))
        sys.exit(1)

    with open(sys.argv[2], "w") as fd:
        print_dir(sys.argv[1], fd)