Combine images using Pillow and Python

[killerrex]

I will split the script in 3 different steps:

• A function that from a list of images create a thumbnail
  
• List all the image files
  
• Split in groups of a desired size a list of images
  

For the 1st point you can do something like:

def create_collage(files, out):
    # You can add a check to guarantee that the list of images is not bigger than 64...
    target_img = Image.new("RGB", (800, 800))
    for k, png in enumerate(files):
        row, col = divmod(k, 8)
        img = Image.open(png)
        img.thumbnail((100, 100))
        target_img.paste(img, (100*row, 100*col))

    target_img.save(out)

To list all the images in a directory you can use the glob module that will filter them by extension for you:

import glob
files = glob.glob('./*.png')

And to group every 64 elements might be:

groups = [files[k:k+64] for k in range(0, len(files), 64)]