import logging
from argparse import ArgumentParser
logger = None

class MyClass:
    def __init__(self):
        logger.info('initialized')

def main():
    parser = ArgumentParser()
    parser.add_argument('--verbose', default=False, action='store_true')
    args = parser.parse_args()

    global logger
    if args.verbose:
        logging.basicConfig(format="%(levelname)s: %(message)s", level=logging.DEBUG)
    else:
        logging.basicConfig(format="%(levelname)s: %(message)s", level=logging.INFO)
    logger = logging.getLogger('mylogger')
    myclass = MyClass()


if __name__ == '__main__':
    main()