replace.py

import os, argparse

def main(args):
    for file in os.listdir(args.dir):
        if file.endswith(".txt"):
            with open(os.path.join(args.dir, file), "r", encoding="utf-8") as f:
                lines = f.readlines()
            with open(os.path.join(args.dir, file), "w", encoding="utf-8") as f:
                for line in lines:
                    if args.replace in line:
                        line = line.replace(args.replace, args.replacement)
                    f.write(line)

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Replace a string in all .txt files in the current directory.")
    parser.add_argument("--replace", type=str, required=True, help="String to replace")
    parser.add_argument("--replacement", type=str, required=True, help="Replacement string")
    parser.add_argument("--dir", type=str, default="./", help="Directory to search for .txt files, defaults to current directory")
    args = parser.parse_args()
    main(args)