IssueTracker

I experimented with Stackdriver and Python logger API. Here are my results.

Calls to

logger.info("info")
logger.warning("warning")

output results with the expected severity.

E.g.:

  jsonPayload: {
    message: "warning"
    python_logger: "example"
  }
  receiveTimestamp: "2023-05-05T09:59:32.830676891Z"
  severity: "WARNING"

A call to logger.log(300, 'notice') produces an entry with severity "NOTICE".

The call logger.log(30, 'warning') is equivalent to logger.warning("warning")

However, if you specify an arbitrary severity value, the log explorer is not happy

logger.log(25, 'between INFO and WARNING'); // It is not mapped to NOTICE

The above call works with no errors but the log explorer returns an error

Error: There is an unknown error while executing this operation.

You may add custom log levels and extend Google Cloud Logging handler CloudLoggingHandler like so:

# A mapping of custom Python log levels to Google Cloud Logging severity
# 300 - GCLoud notice
# 700 - GCloud alert
# 800 - GCloud emergency 
py_level_to_severity = {25:300, 70:700, 80:800}

class CloudLoggingHandlerX(CloudLoggingHandler):
    def emit(self, record):
        level = record.levelno
        if record.levelno in py_level_to_severity:
            record.levelno = py_level_to_severity[record.levelno]

        super().emit(record)
        record.levelno = level

Then, you will be able to log at notice, alert and emergency levels with Python Logger:

logger=logging.getLogger(__name__)
logger.log(25, "log entry with notice severity")

or you may even introduce new functions like notice, alert, emergency

logger.notice("log entry with notice severity")

See the complete code here, utils/logging.py file.