import Image

import os

import os.path

import sys

path = sys.argv[1]

small_path = (path[:-1] if path[-1]=='/' else path) +'_small'

if not os.path.exists(small_path):

    os.mkdir(small_path)

for root, dirs, files in os.walk(path):

    for f in files:

        fp = os.path.join(root, f)

        img = Image.open(fp)

        w, h = img.size

        img.resize((w/2, h/2)).save(os.path.join(small_path, f), "JPEG")

        print fp