logger.py

# information about logging in python
# see link: https://www.toptal.com/python/in-depth-python-logging

import logging
import sys
from logging.handlers import TimedRotatingFileHandler

FORMATTER = logging.Formatter("%(asctime)s [%(module)s -> %(funcName)s] %(levelname)s: %(message)s")
LOG_FILE = "log.log"


def get_console_handler():
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setFormatter(FORMATTER)
    return console_handler


def get_file_handler():
    file_handler = TimedRotatingFileHandler(LOG_FILE, when='midnight')
    file_handler.setFormatter(FORMATTER)
    return file_handler


def get_logger(logger_name):
    logger = logging.getLogger(logger_name)
    logger.setLevel(logging.DEBUG)  # better to have too much log than not enough
    logger.addHandler(get_console_handler())
    logger.addHandler(get_file_handler())
    # with this pattern, it's rarely necessary to propagate the error up to parent
    logger.propagate = False
    return logger