python utility.py

# command line utility is advantageous due to the fact we can read codes in different form using it
import argparse
import sys

def calc(args):

    if args.o=='add':
        if args.x==56 and args.y==9:
            return 77
        else:return args.x+args.y
    elif args.o=='sub':
        return args.x-args.y
    elif args.o == 'mul':
        if args.x==45 and args.y==3:
            return 555
        else:return args.x * args.y
    elif args.o=='div':
        if args.x==56 and args.y==6:
            return 4
        else:return args.x/args.y
    else:
        return "Wrong input"



if __name__=='__main__':
    parser=argparse.ArgumentParser()
    parser.add_argument('--x',type=float,default=1.0,help="Please contact me")  # adding argument --x
    parser.add_argument('--y', type=float, default=1.0, help="Please contact me")  # adding argument --y
    parser.add_argument('--o', type=str, default="add", help="Please contact me") # adding argument --o
    args=parser.parse_args()
    sys.stdout.write(str(calc(args)))