Convenient logger helper

logging.py

import logging
import logging.handlers
import os.path as path


def configure_logger(
        logger_name='logger',
        log_dir='/tmp/',
        filename='',
        to_stdout=True,
        to_file=False,
        level=logging.DEBUG,
        log_format = '[%(asctime)s] %(levelname)7s :: %(message)s') -> logging.Logger:

    if not filename:
        filename = logger_name + '.log'
    log_location = path.join(log_dir, filename)

    logger = logging.getLogger(logger_name)
    logger.setLevel(level)
    logger.handlers = []

    formatter = logging.Formatter(log_format)
    # Stdout
    if to_stdout:
        stdout = logging.StreamHandler()
        stdout.setLevel(level)
        stdout.setFormatter(formatter)
        logger.addHandler(stdout)

    # Filehandler
    if to_file:
        file_handler = logging.handlers.RotatingFileHandler(
            log_location, 
            mode='a', 
            maxBytes=10**8, 
            backupCount=1,
        )
        file_handler.setLevel(level)
        file_handler.setFormatter(formatter)
        logger.addHandler(file_handler)
        print('Log to file {}'.format(log_location))

    logger.propagate = False
    return logger


def log_progress_every():
    pass


def log_to_slack():
    pass