class calculator: print("choose option : ") print("1. Addition") print("2. Subtract") print("3. Division") n = int(input("select option: ")) if(n==1): print("Addition is selected") num1 = int(input("Enter the number:")) num2 = int(input("Enter the number:")) obj = Addition(num1, num2) if(n==2): print("Subtraction is selected") if(n==3): print("Division is selected")