Convet a file to UTF-8 encoding automatically with Python

encoding_converter.py

import chardet
import sys


def convert_to_utf8(raw_content, encoding=None):
    encoding = encoding or chardet.detect(raw_content)["encoding"]
    try:
        return raw_content.decode(encoding)
    except UnicodeDecodeError:
        print("\tFailed to decode with {} encoding".format(encoding))
    print("\tTry it with GBK")
    try:
        return raw_content.decode("GBK")
    except UnicodeDecodeError:
        print("\tGBK won't work either")
    return None


def main(argv):
    for i in range(1, len(argv)):
        file_path = argv[i]
        print("{:d}/{:d}: {}".format(i, len(argv) - 1, file_path))
        with open(file_path, mode="rb") as f:
            raw = f.read()
        converted = convert_to_utf8(raw)
        if converted is None:
            print("Failure")
            continue
        with open(file_path, mode="w", encoding="utf8") as f:
            f.write(converted)
        print("Success")


if __name__ == '__main__':
    main(sys.argv)