logging with argparse, from https://stackoverflow.com/questions/14097061/easier-way-to-enable-verbose-logging

logging_with_argparse.py

import argparse
import logging

parser = argparse.ArgumentParser()
parser.add_argument('-d','--debug',
    help='Print lots of debugging statements',
    action="store_const",dest="loglevel",const=logging.DEBUG,
    default=logging.WARNING
)
parser.add_argument('-v','--verbose',
    help='Be verbose',
    action="store_const",dest="loglevel",const=logging.INFO
)
args = parser.parse_args()    
logging.basicConfig(level=args.loglevel)