def __new__(cls, document_class=dict,
                tz_aware=False, uuid_representation=PYTHON_LEGACY,
                unicode_decode_error_handler="strict",
                tzinfo=None):
        if not (issubclass(document_class, MutableMapping) or
                _raw_document_class(document_class)):
            raise TypeError("document_class must be dict, bson.son.SON, "
                            "bson.raw_bson_document.RawBSONDocument, or a "
                            "sublass of collections.MutableMapping")
        if not isinstance(tz_aware, bool):
            raise TypeError("tz_aware must be True or False")
        if uuid_representation not in ALL_UUID_REPRESENTATIONS:
            raise ValueError("uuid_representation must be a value "
                             "from bson.binary.ALL_UUID_REPRESENTATIONS")
        if not isinstance(unicode_decode_error_handler, (string_type, None)):
            raise ValueError("unicode_decode_error_handler must be a string "
                             "or None")
        if tzinfo is not None:
            if not isinstance(tzinfo, datetime.tzinfo):
                raise TypeError(
                    "tzinfo must be an instance of datetime.tzinfo")
            if not tz_aware:
                raise ValueError(
                    "cannot specify tzinfo without also setting tz_aware=True")

        return tuple.__new__(
            cls, (document_class, tz_aware, uuid_representation,
                  unicode_decode_error_handler, tzinfo))
dataset/ETHPy150Open mongodb/mongo-python-driver/bson/codec_options.py/CodecOptions.__new__/original