Easier way to enable verbose logging

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I find both --verbose (for users) and --debug (for developers) useful. Here’s how I do it with logging and argparse:

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)

So if --debug is set, the logging level is set to DEBUG. If --verbose, logging is set to INFO. If neither, the lack of --debug sets the logging level to the default of WARNING.

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