splitnh

#! /usr/bin/env python3
import sys
from PIL import Image
if len(sys.argv) > 1:
    name = sys.argv[1]
    with Image.open(name) as input_image:
        rgba_image = input_image.convert('RGBA')
        rgb_image = rgba_image.convert('RGB')
        alpha_image = rgba_image.split()[-1]
        base_name = ".".join(name.split(".")[:-1])
        rgb_image.save(base_name + "_n.tga")
        alpha_image.save(base_name + "_h.tga")