config_example.json

{
    "version": 1,
    "root" : {
        "level": "NOTSET",
        "propagate" : true,
        "handlers" : []
    },
    "loggers" : {
        "a.b" : {
            "level" : "DEBUG",
            "propagate" : true,
            "filters" : ["f1"],
            "handlers" : ["h1"]
        },
        "a" : {
            "level" : "WARN",
            "propagate" : false,
            "filters" : ["f2"],
            "handlers" : ["h2"]
        }
    },
    "handlers" : {
        "h1" : {
            "class" : "NullHandler",
            "level" : "INFO",
            "formatter" : "ft1"
        },
        "h2" : {
            "class" : "FileHandler",
            "level" : "ERROR",
            "filename" : "./test.log",
            "mode" : "O_TRUNC",
            "bufferSize" : 0,
            "formatter" : "ft2"
        }
    },
    "formatters" : {
        "ft1" : {
            "format" : "%(asctime)s %(levelname)s %(name)s %(message)s",
            "datefmt" : "%Y-%m-%d %H:%M:%S.%3n"
        },
        "ft2" : {
            "format" : "%(message)s"
        }
    },
    "filters" : {
        "f1" : {
            "name" : "a.b"
        },
        "f2" : {
            "name" : "a"
        }
    }
}