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Python Python Basics (2015) Logic in Python Try and Except

Sean Flanagan
Sean Flanagan
33,235 Points
Posted by Sean Flanagan
Sean Flanagan
33,235 Points

Try and Except - Task 3

Hi.

I'm stuck on the last part of this challenge:

"You're doing great! Just one more task but it's a bigger one. Right now, we turn everything into a float. That's great so long as we're getting numbers or numbers as a string. We should handle cases where we get a non-number, though. Add a try block before where you turn your arguments into floats. Then add an except to catch the possible ValueError. Inside the except block, return None. If you're following the structure from the videos, add an else: for your final return of the added floats."

I'm not sure what's stonewalling me. I would be grateful for any input.

Thanks in advance

Sean :-)

trial.py 
def add(num1, num2):
    try:
        return int(num1) + int(num2)
    except ValueError:
        return None
    else:
        return num1 + num2

    a = float(num1)
    b = float(num2)
    return a + b

1 Answer

Cheo R
Cheo R
37,150 Points
Cheo R
Cheo R
37,150 Points

Hello Sean, you're on the right track. you don't anything else below the else's return statement, and in the try block, change your int() to float().

def add(num1, num2):
    try:
        return float(num1) + float(num2)
    except ValueError:
        return None
    else:
        return num1 + num2
Sean Flanagan
Sean Flanagan
33,235 Points
Sean Flanagan
Sean Flanagan
33,235 Points

Hi Cheo.

That worked. Thanks!

Sean :-)