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

Posted by Juwan Reeves
Juwan Reeves
510 Points

NameError stuck and do not know why?????

its saying i did not define add??????

trial.py 
def add(Days, months):
    try:
        Days = float(Days)
        months = float(months)
    except ValueError:
        return none
    else:    
        return (Days + months)

2 Answers

Jennifer Nordell
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STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! This Bummer message is a bit odd. If you run your code in the workspace (or on your local system) and try and call the add function and send in arguments like (2, "hello"), when it hits the ValueError, it triggers a NameError on none saying that it isn't defined.

Much like the reserved words True and False in Python, the reserved word None must also be capitalized. Right now it's looking for a variable named none which it can't find.

You wrote:

return none

But that should be:

return None

Hope this helps! :sparkles:

matth89
matth89
17,826 Points
matth89
matth89
17,826 Points

You're so close! 'None' underneath your except ValueError needs to be capitalized.