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

Posted by galhardoo
galhardoo
19,272 Points

OMG :c Anyone can help me here ~ How I can solve this problem below?

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

. Bummer! Try again!

trial.py 
def add(var1, var2):
try:
    return (var1) + (var2)
except ValueError:
    return None
else:
    return float(var1) + float(var2)

1 Answer

Idan Melamed
Idan Melamed
16,285 Points
Idan Melamed
Idan Melamed
16,285 Points

I'm not sure my answer is the optimal one, but it passes:

def add(arg1, arg2):
    try:
        float(arg1) + float(arg2)
    except ValueError:
        return None
    else:
        return float(arg1) + float(arg2)