Basic logging

basic_logging01.py

import logging
logging.basicConfig(filename='debug.log', level=logging.DEBUG,
                    format='%(asctime)s %(levelname)s %(funcName)s => %(message)s')

def my_beautiful_function():
  logging.debug("Enter on function!")
  print("Hello!")

basic_logging02.py

# Reference: https://realpython.com/python-logging/

import logging

# Create a custom logger
logger = logging.getLogger(__name__)

# Create handlers
c_handler = logging.StreamHandler()
f_handler = logging.FileHandler('file.log')
c_handler.setLevel(logging.WARNING)
f_handler.setLevel(logging.ERROR)

# Create formatters and add it to handlers
c_format = logging.Formatter('%(name)s - %(levelname)s - %(message)s')
f_format = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
c_handler.setFormatter(c_format)
f_handler.setFormatter(f_format)

# Add handlers to the logger
logger.addHandler(c_handler)
logger.addHandler(f_handler)

logger.warning('This is a warning')
logger.error('This is an error')

override_root_log.py

import logging
import logging.config

from .config import settings

# Complete log:
#
# JSON_FORMAT = (
#     "%(asctime)s %(levelname)s %(pathname)s %(lineno)s %(process)s "
#     "%(processName)s %(thread)s %(threadName)s %(name)s %(message)s"
# )

JSON_FORMAT = "%(name)s %(message)s"

DEFAULT_LOGGING_CONF = {
    "version": 1,
    "disable_existing_loggers": False,
    "formatters": {
        "default": {"format": "%(asctime)s %(module)s %(message)s"},
        "json": {"()": "pythonjsonlogger.jsonlogger.JsonFormatter", "format": JSON_FORMAT},
    },
    "filters": {
        "logger_filter": {
            "()": "belogging.filters.LoggerFilter",
        },
    },
    "handlers": {
        "default": {
            "level": settings.LOG_LEVEL,
            "class": "logging.StreamHandler",
            "formatter": "json",
            "filters": ["logger_filter"],
        },
        "null": {
            "class": "logging.NullHandler",
        },
    },
    "root": {
        "handlers": ["default"],
        "level": "DEBUG",
    },
    "loggers": {},
}

logging.config.dictConfig(DEFAULT_LOGGING_CONF)