Split img down the middle vertically.

split_img.py

from PIL import Image

def split_img(img_path):
	"""
	Splits an image vertically down the middle and returns a tuple
	containing (left_half, right_half) Pillow Image objects.
	"""
	img = Image.open(img_path)
	width, height = img.size
	half_width = int(width/2)
	left_half = img.crop((0, 0, half_width, height))
	right_half = img.crop((half_width, 0, width, height))
	return (left_half, right_half)