Logging
Handler Formatter
A handler's output can customized by setting a Formatter.
A formatter can be created by adding a formatting string to logging.Formatter. This can contain normal text and predefined fields, such as time and loglevel.
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)
You can also create a fully custom formatter by extending the logging.Formatter class and implementing the format method. This allows you to do whatever you want, such as logging as json.
class JsonFormatter(logging.Formatter):
def format(self, record: logging.LogRecord) -> str:
return json.dumps({
"time": record.asctime,
"name": record.name,
"level": record.levelname,
"message": record.getMessage(),
})
handler.setFormatter(JsonFormatter())