# >>> name = b'f\x94n'
# >>> name.decode('sjis')
# 'f馬'
# >>> name.decode('cp437')
# 'fön'

class Encoding(object):
    def _decode_filename(self, bytes_filename, flags, default_encoding=None):
        encodings = []
        if default_encoding:
            encodings.append(default_encoding)
        if flags & 0x800:
            # UTF-8 file names extension
            encodings.append('utf-8')
        # Japanese encoding
        encodings.extend(['iso-2022-jp', 'euc-jp', 'sjis'])
        # Historical ZIP filename encoding
        encodings.append('cp437')

        for encoding in encodings:
            try:
                filename = bytes_filename.decode(encoding)
                break
            except UnicodeDecodeError as raiz:
                if raiz.reason != 'illegal multibyte sequence':
                    raise UnicodeDecodeError(*raiz.args)
        if self.debug:
            print('encoding: {}, filename: {}'.format(encoding, filename))

        return filename

if __name__ == '__main__':
    encoding = Encoding()
    encoding.debug = True
    name = b'f\x94n'

    sjis_filename = encoding._decode_filename(name, 0, 'sjis')
    cp437_filename = encoding._decode_filename(name, 0, 'cp437')
    print('sjis_filename =', sjis_filename)
    print('cp437_filename =', cp437_filename)