I'm running on windows. this is my python code:

import sys
import os
import json

def get_home_file_paths(directory):
    dir_paths = []
    for root, dirs, files in os.walk(directory):
        for name in dirs:
            dir_paths.append(os.path.join(root, name))
    return json.dumps(dir_paths)
if __name__ == '__main__':
    print get_home_file_paths(sys.argv[1])

and this, my php code:

<?php

$result = exec(" python get_files.py C:\wamp\www\pyth ");
echo $result;
$result_array=json_decode($result);
foreach ($result_array as $row){
    echo $row . "<br>";
}

?> 

I am pretty new at this. what am i doing wrong? i'm using wamp as server and i have note changed any configuration. thx!