A fancy log format with ISO date, package and function name

fancy_log_format.py

import logging
from datetime import datetime
from typing import Union


def get_configured_logger(level: Union[int, str]) -> logging.Logger:
    """
    Set a useful logging format and return a logger with a full reference to the current module.

    >>> import logging
    >>> logger = get_configured_logger(logging.INFO)
    >>> logger.info("building table")
    2021-07-16 10:55:17.417 INFO     my_package.my_function: building table

    :param level: as defined in logging library
    """
    logging.basicConfig(
        level=level,
        format="%(asctime)s.%(msecs)03d %(levelname)-8s %(name)s.%(funcName)s: %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
        handlers=[
            logging.FileHandler(f"logs/log_{datetime.now().strftime('%Y%m%d-%H%M%S.%f')[:-3]}.txt"),
            logging.StreamHandler()
        ]
    )
    return logging.getLogger(__name__)


logger = get_configured_logger(logging.INFO)


def my_function():
    logger.info("My log line.")


my_function()