def _extract_log_keys()

in aws_lambda_powertools/logging/formatter.py [0:0]

• 12 lines of code
• 9 McCabe index (conditional complexity)

    def _extract_log_keys(self, log_record: logging.LogRecord) -> Dict[str, Any]:
        """Extract and parse custom and reserved log keys

        Parameters
        ----------
        log_record : logging.LogRecord
            Log record to extract keys from

        Returns
        -------
        formatted_log: Dict
            Structured log as dictionary
        """
        record_dict = log_record.__dict__.copy()
        record_dict["asctime"] = self.formatTime(record=log_record)
        extras = {k: v for k, v in record_dict.items() if k not in RESERVED_LOG_ATTRS}

        formatted_log = {}

        # Iterate over a default or existing log structure
        # then replace any std log attribute e.g. '%(level)s' to 'INFO', '%(process)d to '4773'
        # lastly add or replace incoming keys (those added within the constructor or .structure_logs method)
        for key, value in self.log_format.items():
            if value and key in RESERVED_LOG_ATTRS:
                formatted_log[key] = value % record_dict
            else:
                formatted_log[key] = value

        formatted_log.update(**extras)
        return formatted_log