Python: try-except block for sum function with 2 arguments

Question

I have a sum function which takes two values as input, and returns the sum. However, I need to raise an exception if either one of them is not of type int or float .

My attempt:

def add(a, b):
    
    try:
        return a+b
    except:
        raise TypeError("{0} is invalid".format(a))
    except:
        raise TypeError("{0} is invalid".format(b))

returns:

SyntaxError: default 'except:' must be last

Is return in the wrong place?

Answer 1

the better form of writing such a thing is in this way:

def add(a, b):
    if type(a) != int and type(a) != float:
        raise TypeError("{0} is invalid".format(a))
    if type(b) != int and type(b) != float:
        raise TypeError("{0} is invalid".format(b))
    return a+b

and use try and catch in where you call this function