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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _populate_input_for_name_id(self, config, record, context, data):
 """ Use a record found in LDAP to populate input for NameID generation. """

        user_id = ""
        user_id_from_attrs = config['user_id_from_attrs']
        for attr in user_id_from_attrs:
            if attr in record["attributes"]:
                value = record["attributes"][attr]
                if isinstance(value, list):
                    # Use a default sort to ensure some predictability since the
                    # LDAP directory server may return multi-valued attributes
                    # in any order.
                    value.sort()
                    user_id += "".join(value)
                    satosa_logging(
                        logger,
                        logging.DEBUG,
                        "Added attribute {} with values {} to input for NameID".format(attr, value),
                        context.state
                        )
                else:
                    user_id += value
                    satosa_logging(
                        logger,
                        logging.DEBUG,
                        "Added attribute {} with value {} to input for NameID".format(attr, value),
                        context.state
                        )
        if not user_id:
            satosa_logging(
                logger,
                logging.WARNING,
                "Input for NameID is empty so not overriding default",
                context.state
                )
        else:
            data.subject_id = user_id
            satosa_logging(
                logger,
                logging.DEBUG,
                "Input for NameID is {}".format(data.subject_id),
                context.state
                )