black nozzle doesn't work so we try with some other one let's go

recolor.py

from pdf2image import convert_from_path
from PIL import Image, ImageOps
import argparse
import itertools
from os import path, system
import tempfile

parser = argparse.ArgumentParser()

parser.add_argument("filename")
parser.add_argument("color")

args = parser.parse_args()

old_pdf = path.splitext(args.filename)
new_pdf = f"{old_pdf[0]}_{args.color}.pdf"
color = ["C", "M", "Y"].index(args.color)
dpi = 320

with tempfile.TemporaryDirectory() as tmp:
    converted_pages = convert_from_path(args.filename, output_folder=tmp, dpi=dpi)

    for i in range(len(converted_pages)):
        current_page = converted_pages[i]
        current_page = current_page.convert("LA")
        current_page = current_page.convert("CMYK")
        image_data = current_page.load()
        coords = [range(coord) for coord in current_page.size]

        for x, y in itertools.product(*coords):
            if image_data[x, y] != (0, 0, 0, 0):
                color_value = image_data[x, y][3]
                new_pixel_data = [0, 0, 0, 0]
                new_pixel_data[color] = color_value
                image_data[x, y] = tuple(new_pixel_data)

        if path.isfile(new_pdf):
            current_page.save(new_pdf, "PDF", append=True, resolution=dpi)
        else:
            current_page.save(new_pdf, "PDF", resolution=dpi)