from PIL import Image, ImageOps

#
# https://gist.github.com/njanakiev/1932e0a450df6d121c05069d5f7d7d6f
#
def concat_images(image_paths, size, shape=None):
    # Open images and resize them
    width, height = size
    images = map(Image.open, image_paths)
    images = [ImageOps.fit(image, size, Image.ANTIALIAS) for image in images]

    # Create canvas for the final image with total size
    shape = shape if shape else (1, len(images))
    image_size = (width * shape[1], height * shape[0])
    image = Image.new("RGB", image_size)

    # Paste images into final image
    for row in range(shape[0]):
        for col in range(shape[1]):
            offset = width * col, height * row
            idx = row * shape[1] + col
            image.paste(images[idx], offset)

    return image