(Python) 外部ファイルからログレベルを変更するサンプル

conf.json

{
	"version": 1,
	"disable_existing_loggers": false,
	"formatters": {
		"default": {
			"format": "%(levelname)s:%(name)s:%(message)s"
		}
	},
	"handlers": {
		"console": {
			"class": "logging.StreamHandler",
			"formatter": "default"
		}
	},
	"loggers": {
		"__main__": {
			"handlers": ["console"],
			"propagate": true
		}
	},
	"root": {
		"level": "DEBUG"
	}
}

main.py

import json
import logging
import logging.config

with open('conf.json') as f:
    conf = json.load(f)

logging.config.dictConfig(conf)
logger = logging.getLogger(__name__)

logger.debug('DEBUG')