Creating a Command Line Utility In Python

 


import argparse

import sys


def calc(args):

    if args.o == 'add':

        return args.x + args.y


    elif args.o == 'mul':

        return args.x * args.y


    elif args.o == 'sub':

        return args.x - args.y


    elif args.o == 'div':

        return args.x / args.y


    else:

        return "Something went wrong"


if __name__ == '__main__':

    parser = argparse.ArgumentParser()

    parser.add_argument('--x', type=float, default=1.0,

                        help="Enter first number. This is a utility for calculation. Please contact harry bhai")


    parser.add_argument('--y', type=float, default=3.0,

                        help="Enter second number. This is a utility for calculation. Please contact harry bhai")


    parser.add_argument('--o', type=str, default="add",

                        help="This is a utility for calculation. Please contact harry bhai for more")


    args = parser.parse_args()

    sys.stdout.write(str(calc(args)))


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