log_cfg.json

{
  "version": 1,
  "disable_existing_loggers": false,
  "formatters": {
    "extra": {
      "format": "%(asctime)s.%(msecs)03d %(levelname)-8s [%(filename)s:%(lineno)d - %(funcName)s %(process)d/%(processName)s]     %(message)s",
      "datefmt": "%Y-%m-%d %H:%M:%S"
    }
  },
  "handlers": {
    "console": {
      "class": "logging.StreamHandler",
      "level": "DEBUG",
      "formatter": "extra",
      "stream": "ext://sys.stdout"
    },
    "file_handler": {
      "class": "logging.handlers.RotatingFileHandler",
      "level": "INFO",
      "formatter": "extra",
      "filename": "ethtx_ce.log",
      "maxBytes": 5242880,
      "backupCount": 5,
      "encoding": "utf8"
    }
  },
  "root": {
    "level": "INFO",
    "handlers": [
      "file_handler",
      "console"
    ]
  }
}