allianceauth/docs/development/custom/logging.md

Logging from Custom Apps

Alliance Auth provides a logger for use with custom apps to make everyone's life a little easier.

Using the Extensions Logger

The extensions logger should not be directly used by custom apps as the error messages logged to it will not be labeled with the correct name. In order to correctly use the extensions logger please follow the code below.

import logging

logger = logging.getLogger('extensions.' + __name__)
logger.name = __name__

This works by creating a child logger of the extension logger which propagates all log entries to the parent (extensions) logger.