Simple verbose logging setup example

logging_example.py

from argparse import ArgumentParser
ap = ArgumentParser()
ap.add_argument('--verbose', '-v', action='store_true', default=False)
args = ap.parse_args()

imoprt logging
log = logging.getLogger(__name__)

if args.verbose:
    log.basicConfig(format="%(levelname)s: %(message)s", level=log.DEBUG)
    log.info("Verbose output.")
else:
    log.basicConfig(format="%(levelname)s: %(message)s", level=log.ERROR)