In [1]:

    

def calc():
    x=int(raw_input("Please enter first number "))
    y=int(raw_input("Please enter second number "))
    ope=(raw_input("Please enter operator "))
    
    if ope not in '+-/*':
        return 'Please enter any of these characters: "+,-,*,/"!'
                     
    elif ope == "+":
        return x + y
    elif ope == "-":
        return x - y
    elif ope == "*":
        return x * y
    elif ope == "/":
        return x / y


    

In [2]:

    

calc()


    

    




Please enter first number 30
Please enter second number 2
Please enter operator /






    
Out[2]:





15

In [ ]: