Initialize python logging with file handler

init_logging.py

def init_logging(level='debug'):
    import logging
    import os
    import datetime
    from pytz import timezone

    if level == 'debug':
        LOGGING_LEVEL = logging.DEBUG
    elif level == 'info':
        LOGGING_LEVEL = logging.INFO
    else:
        raise ValueError('Invalid option for level ({})'.format(level))

    DATE_STR = datetime.datetime.now(
        timezone('US/Pacific')
    ).isoformat()
    LOGGING_FOLDER = 'logs'
    if not os.path.exists(LOGGING_FOLDER):
        os.makedirs(LOGGING_FOLDER)
    LOGGING_HANDLERS = [
        logging.FileHandler(os.path.join(
            LOGGING_FOLDER,
            'out.{}.log'.format(DATE_STR)
        )),
        logging.StreamHandler()
    ]
    log_format = (
        '%(asctime)s - '
        '%(name)s - '
        '%(funcName)s - '
        '%(levelname)s - '
        '%(message)s'
    )

    logging.basicConfig(
        level=LOGGING_LEVEL,
        format=log_format,
        handlers=LOGGING_HANDLERS,
    )