Modern Python Standard Library Cookbook

How to do it...

Perform the following steps for this recipe:

1. The argparse.ArgumentParser object is the primary object in charge of parsing command-line options:

import argparse import operator import logging import functools parser = argparse.ArgumentParser( description='Applies an operation to one or more numbers' ) parser.add_argument("number", help="One or more numbers to perform an operation on.", nargs='+', type=int) parser.add_argument('-o', '--operation', help="The operation to perform on numbers.", choices=['add', 'sub', 'mul', 'div'], default='add') parser.add_argument("-v", "--verbose", action="store_true", help="increase output verbosity") opts = parser.parse_args() logging.basicConfig(level=logging.INFO if opts.verbose else ...