Translate characters

translate.py

#!/usr/bin/env python3

import argparse
from pathlib import Path

parser = argparse.ArgumentParser(description='Translate characters')
parser.add_argument('input', help='input file')
parser.add_argument('table', help='table file, "A=Z\\nB=2\\nK=M"')
parser.add_argument('output', help='output file')
parser.add_argument('-e', '--encoding', default="utf-8",
                    help='default utf-8, see https://docs.python.org/3/library/codecs.html#standard-encodings')
args = parser.parse_args()

pinp = Path(args.input)
ptab = Path(args.table)
pout = Path(args.output)

table = ptab.read_text(encoding=args.encoding)
table = {ord(line[0]):ord(line[-1]) for line in table.split("\n") if len(line) >= 3}

txt = pinp.read_text(encoding=args.encoding)
new_txt = txt.translate(table)
pout.write_text(new_txt, encoding=args.encoding)