Command Line Utility of a Faulty Calculator

    
import argparse
import sys

def calc(args):
    if args.o == "+":
        if (args.a == 56 and args.b == 9) or (args.a == 9 and args.b == 56):
            return 77.0
        else:
            return args.a + args.b
    elif args.o == "-":
        return args.a - args.b
    elif args.o == "*":
        if (args.a == 45 and args.b == 3) or (args.a == 3 and args.b == 45):
            return 555.0
        else:
            return args.a * args.b
    elif args.o == "/":
        if args.a == 56 and args.b == 6:
            return 4.0
        else:
            return args.a / args.b
    else:
        return "Something went wrong. Try again!"

parser = argparse.ArgumentParser()
parser.add_argument("--a", type=float, default=1, help="Enter your first number plz")
parser.add_argument("--b", type=float, default=0, help="Enter your second number plz")
parser.add_argument("--o", type=str, default="+", help="Specify your operator plz")
# the default value 1 is returned if we execute only 'python filename.py' without giving any arguments
args = parser.parse_args()
sys.stdout.write(str(calc(args)))