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

Deron Gomez
PLUS
Deron Gomez
Courses Plus Student 2,571 Points
Posted by Deron Gomez
Deron Gomez
Courses Plus Student 2,571 Points

Frustrated..

def add(x, y): try: a = float(x) b = float(y) except ValueError: return None else: return a + b

so tell me whats wrong with this one..........

trial.py 
def add(x, y):
    try:
    a = float(x) 
    b = float(y)
    except ValueError:
        return None
    else:
        return a + b

1 Answer

Paul Harrison
Paul Harrison
5,533 Points
Paul Harrison
Paul Harrison
5,533 Points

Hey Deron -

Because the variables "a" and "b" are assigned in the try, but they're only combined and returned in the "else", this code won't complete the challenge. If you add the "return a + b" to the try, it should work. Unless you're expecting odd input and need the validation, there isn't really a need to do a try/except/else.

Alternatively, this code will work:

def add(x, y):
    return x + y