A small script to convert 1x .png colour palettes from LoSpec to .txt formatted for REXPaint -- REQUIRES: Pillow library https://pillow.readthedocs.io/en/stable/installation.html

rexpaint-palette-converter.py

import argparse

from PIL import Image

BLACK = (0,0,0)
cnt = 0

par = argparse.ArgumentParser(description='A small script to convert 1x .png colour palettes from LoSpec to .txt formatted for REXPaint')

par.add_argument('src', nargs=1, metavar='path', type=str, help='The filepath of the desired .png palette')
par.add_argument('tit', nargs=1, metavar='title', type=str, help='The name of the resulting .txt')

args = par.parse_args()

img = Image.open(args.src[0], 'r')
img = img.convert('RGB')

wid, hei = img.size

val = list(img.getdata())

tit = args.tit[0] + '.txt'
txt = open(tit, 'w')

for i in range(0, 12):
    for j in range(0, 16):
        r,g,b = val[cnt] if cnt < wid else BLACK
        txt.write(f'{{{r},{g},{b}}}{chr(0x9)}')
        cnt += 1
    txt.write('\n')

txt.close()