join_images.py

from PIL import Image
import math
import glob

width, height = [165, 254]
files = glob.glob('./photos/*.jpg')

num_columns = 5
canvas_width = num_columns * width
canvas_height = int(math.ceil(len(files) / float(num_columns))) * height
new_image = Image.new("RGB", (canvas_width, canvas_height), "white")

for i, path in enumerate(files):
  pic = Image.open(path)
  row = int(math.floor(i / num_columns))
  col = i - row * num_columns
  print "pasting image %s at %i, %i" % (path, row, col)

  new_image.paste(pic, (width * col, height * row))

new_image.save('./combined.jpg')