copyimg.py

import os, shutil

src = "img"
dest = "newimg"

if os.path.isdir(dest) == False:
    os.mkdir(dest)

imgs = os.listdir(src)

i = 1
for img in imgs:
    frompic = os.path.join(src, img)
    topic = os.path.join(dest, str(i)+".jpg")

    shutil.copyfile(frompic, topic)

    i = i + 1