log_cfg.json

{
    "version": 1,
    "handlers": {
        "standard": {
            "class": "logging.StreamHandler",
            "level": "DEBUG",
            "formatter": "standard",
            "filters": ["context_filter", "neon_prefix_dropper"]
        },
        "root": {
            "class": "logging.StreamHandler",
            "level": "DEBUG",
            "formatter": "root",
            "filters": ["context_filter"]
        }
    },
    "filters": {
        "context_filter": {
            "()": "logged_groups.ContextFilter"
        },
        "neon_prefix_dropper": {
            "()": "proxy.common_neon.logging.NeonPrefixDropper"
        }
    },
    "formatters": {
        "standard": {
            "format": "%(asctime)s.%(msecs)03d %(levelname)-.1s %(filename)s:%(lineno)d %(process)d %(name)s:%(class)s %(context)s %(message)s",
            "style": "%",
            "datefmt": "%Y-%m-%d %H:%M:%S"
        },
        "root": {
            "format": "%(asctime)s.%(msecs)03d %(levelname)-.1s %(filename)s:%(lineno)d %(process)d %(name)s:Undefined %(context)s %(message)s",
            "style": "%",
            "datefmt": "%Y-%m-%d %H:%M:%S"
        }
    },
    "loggers": {
        "neon": {
            "level": "DEBUG",
            "handlers": ["standard"],
            "propagate": false
        },
        "": {
            "level": "ERROR",
            "handlers": ["root"],
            "propagate": false
        }
    }
}