import optparse

def calculate():
        if options.operand == '+':
                print(int(options.first) + int(options.second))
        elif options.operand == '-':
                print(int(options.first) - int(options.second))
        elif options.operand == '*':
                print(int(options.first) * int(options.second))
        elif options.operand == '/':
                print(int(options.first)  / int(options.second))
        else:
                print("Invalid input. Try again\n")


def menu():
        print("\nWelcome to the calculator program")
        print("Please enter your operands and  operator")
        #firstOperand = raw_input("\nFirst operand:")
        #secondOperand = raw_input("\nSecond operand:")
        #operand = raw_input("\n Operand:")



parser = optparse.OptionParser()

parser.add_option("-f", "--first", dest="first", help="First operand")
parser.add_option("-s", "--second", dest="second", help="Seoncd operand")
parser.add_option("-o", "--operand", dest="operand", help="Operand")
(options, arguments) = parser.parse_args()

calculate()