#!/opt/homebrew/bin/python3
# coding: utf-8
from chardet.universaldetector import UniversalDetector
import sys

def help():
    print("Usage: python encoding_detector.py <file> ...")


if __name__ == "__main__":
    if len(sys.argv) < 2:
        help()
        exit(1)

    for file in sys.argv[1:]:
        with open(file, "rb") as f:
            detector = UniversalDetector()
            for line in f:
                detector.feed(line)
                if detector.done:
                    break
            detector.close()

        print(f"{file} --> {detector.result['encoding']}")