Python argparse and logging

gistfile1.py

import sys
import argparse
import logging; logger = logging.getLogger('__main__')


def parse_args(args=None):
    parser = argparse.ArgumentParser()
    parser.add_argument('--verbose', '-v', default=0, action='count')
    return parser.parse_args(args)


def loglevel(verbose=0):
    assert isinstance(verbose, int)
    try:
        return [
            # logging.CRITICAL,
            # logging.ERROR,
            logging.WARNING, # default
            logging.INFO,
            logging.DEBUG,
            logging.NOTSET,
            ][verbose]
    except LookupError:
        return logging.NOTSET


if __name__ == '__main__':
    options = parse_args()
    logging.basicConfig(level=loglevel(options.verbose), stream=sys.stderr)