I would like to have a logger that can be used both in django and in celery.

When used by django it should print to console, while when used from a celery task, I would like it to output using the default celery handler (in my case, it dumps to a file specified by the –logfile cmd line argument).

This is especially useful for helper functions that are used by both the django server and celery tasks.

This is what I have in my settings.py file:

LOGLEVEL = os.environ.get("LOGLEVEL", "info").upper()
LOGGING = {
    "version": 1,  # the dictConfig format version
    "disable_existing_loggers": False,  # retain the default loggers
    "handlers": {
        # console logs to stderr
        "console": {
            "class": "logging.StreamHandler",
            "formatter": "verbose",
        },
        "django.server": DEFAULT_LOGGING["handlers"]["django.server"],
    },
    "formatters": {
        "verbose": {
            "format": "[{asctime}]|{levelname}| {message}",
            "style": "{",
        },
        "django.server": {
            # "()": "django.utils.log.ServerFormatter",
            "format": "[{asctime}]|{levelname}| {message}",
            "style": "{",
        },
    },
    "loggers": {
        # default for all undefined Python modules
        "": {
            "level": "WARNING",
            "handlers": ["console"],
        },
        # Our application code
        "app": {
            "level": LOGLEVEL,
            "handlers": ["console"],
            # Avoid double logging because of root logger
            "propagate": False,
        },
        # Default runserver request logging
        "django.server": DEFAULT_LOGGING["loggers"]["django.server"],
        "django.channels.server": DEFAULT_LOGGING["loggers"]["django.server"],
    },
}

In my “app” logger, I have only the console handler for now.

If I define a logger like this:

logger = get_task_logger("app").getChild(__name__)

The output goes to the console, but not to the logfile.

If I define a logger like this instead:

logger = get_task_logger(__name__)

The output goes to the logfile, but not to the console.

I would like, somehow, to add the default celery handler, which I think is created/setup here, to my “app” logger.

Is this possible?