unparse.py

#!/usr/bin/env python3

import sys
import argparse

def parse_args():
    parser = argparse.ArgumentParser(description="Unprocess some stuff.")
    parser.add_argument("input", type=str, help="input csv file")
    parser.add_argument("output", type=str, help="output blk file")
    return parser.parse_args()

def main():
    args = parse_args()
    with open(args.input, "r") as f:
        data = f.read()
    data = data.strip().replace("\n", ",")
    data = data.split(",")
    data = [int(x) for x in data]
    with open(args.output, "wb") as f:
        for b in data:
            f.write(chr(b).encode("charmap"))
        # f.write(bytearray(data))


if __name__ == "__main__":
    main()