Convert a group of files with unknown encodings to UTF-16 (Python)

textutf16y.py

import os, sys
from glob import iglob

work_dir = os.getcwd()
file_list = (
    [f for f in iglob(os.path.join(work_dir, '**/*.ks'), recursive=True) if os.path.isfile(f)] +
    [f for f in iglob(os.path.join(work_dir, '**/*.tjs'), recursive=True) if os.path.isfile(f)]
)

all_codecs = ['utf_16', 'utf_8_sig', 'ascii', 'cp932', 'utf_8', 'shift_jis', 'shift_jis_2004', 'shift_jisx0213']

def find_codec(text):
    for j in all_codecs:
        try:
            return j, text.decode(j)
        except:
            pass
    return None, None

arg_enc = None
if len(sys.argv) > 1:
    arg_enc = sys.argv[2].strip('" ')
    print('Using provided encoding:', arg_enc)

for efile in file_list:
    failed = False
    enc = arg_enc if len(sys.argv) > 1 else None
    
    with open(efile, 'rb') as f:
        bstr = f.read()
        bstr = bstr.replace(b'\r\n', b'\n')
        if not enc:
            enc, dstr = find_codec(bstr)
        else:
            try:
                dstr = bstr.decode(enc)
            except:
                enc, dstr = find_codec(bstr)
        if not dstr:
            failed = True
    print(efile.replace(work_dir, ''), '    ', enc + '... ', end='', flush=True)
    if not failed and enc != 'utf_16':
        with open(efile, 'w', encoding='utf-16') as f:
            f.write(dstr)
            print('OK')
    elif failed:
        print('FAILED')
    else:
        print('IGNORED')

This is useful when KiriKiri or Tyrano Builder games crash on non Japanese ANSI encoding systems.
In most cases utf-16 can be substituted with utf-8-sig too.