Python argparse logging verbosity

cli.py

import argparse
import logging
parser = argparse.ArgumentParser(
    description="Demo of setting logging verbosity using -vvvv style args",
    formatter_class=argparse.ArgumentDefaultsHelpFormatter,
)
parser.add_argument("-v", "--verbose", dest="verbosity", action="count", default=0,
                    help="Verbosity (between 1-4 occurrences with more leading to more "
                         "verbose logging). CRITICAL=0, ERROR=1, WARN=2, INFO=3, "
                         "DEBUG=4")
log_levels = {
    0: logging.CRITICAL,
    1: logging.ERROR,
    2: logging.WARN,
    3: logging.INFO,
    4: logging.DEBUG,
}

if __name__ == '__main__':
    args = parser.parse_args()
    logging.basicConfig(level=log_levels[args.verbosity])

@MaxenceG2M can be solved easily by doing something like:
logging.basicConfig(level=log_levels[min(args.verbosity, max(log_levels.keys()))])