logging-init.py

import json
import logging
import logging.config

with open('python-logging.json', 'r') as f:
    logging.config.dictConfig(json.load(f))

logger = logging.getLogger(__name__)
logger.info("Logging config loaded from json")
logger.debug("This is a DEBUG message on the logger.")
logger.info("This is an INFO message on the logger.")
logger.warning("This is a WARNING message on the child logger.")
logger.error("This is an ERROR message.")

python-logging.json

{
  "version": 1,
  "disable_existing_loggers": "False",
  "formatters": {
    "brief": {
      "class": "logging.Formatter",
      "format": "{levelname:7} - {asctime} - {name} - {message}",
      "style": "{"
    },
    "simple": {
      "class": "logging.Formatter",
      "format": "{levelname:7} - {asctime},{msecs:03,.0f} - {name:12} - {message}",
      "style": "{",
      "datefmt": "%H:%M:%S"
    },
    "multi-process": {
      "class": "logging.Formatter",
      "format": "%(levelname)-4s - %(asctime)s - %(name) - [%(process)d] - %(message)s"
    },
    "multi-thread": {
      "class": "logging.Formatter",
      "format": "%(levelname)-4s; %(asctime)s; %(name)-15s; [%(threadName)s]; %(message)s"
    },
    "verbose": {
      "class": "logging.Formatter",
      "format": "%(levelname)-4s; %(asctime)s; %(name)-15s; [%(process)d]; %(threadName)s; %(message)s"
    },
    "multiline": {
      "class": "logging.Formatter",
      "format": "thread: %(threadName)s\nLevel: %(levelname)s\nTime: %(asctime)s\nLocation: %(pathname)s:%(lineno)d\nMethod: %(funcName)s\nMessage:\n%(message)s\n"
    }
  },
  "handlers": {
    "console": {
      "level": "DEBUG",
      "class": "logging.StreamHandler",
      "formatter": "simple",
      "stream": "ext://sys.stdout"
    }
  },
  "loggers": {
    "botocore": {
      "level": "WARNING",
      "handlers": [
        "console"
      ],
      "propagate": "no"
    }
  },
  "root": {
    "handlers": [
      "console"
    ],
    "level": "DEBUG"
  }
}