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

Posted by Adam Marasli-Zaade
Adam Marasli-Zaade
2,966 Points

Solved it yesterday, I am trying to solve it today as well but I keep doing something wrong for some reason.

def add(a, b,):

try:
    return(float(a) + float(b))
except ValueError:
    return None
else:
    return(float(a) + float(b))

? thnx :)

2 Answers

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

Hi there! Your code and logic are fine. The syntax is spot on. However, the indentation is incorrect. The declaration of the of the method begins a block. Everything after must be indented to be a part of this block. So, if I simply rework your indentation, it passes the last step.

def add(a, b,):

    try:
        return(float(a) + float(b))
    except ValueError:
        return None
    else:
        return(float(a) + float(b))

Keep in mind, this is your code, only properly indented! Hope this helps! :sparkles:

Sneha Nagpaul
Sneha Nagpaul
10,124 Points
Sneha Nagpaul
Sneha Nagpaul
10,124 Points

I don't understand the else statement in this code. Isn't it redundant?

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

Yes, Sneha Nagpaul. It is redundant and not needed at all. In fact, the instructions on step 3 hint at this. There is some part in the video where they use the else statement so in step 3 you'll see this:

If you're following the structure from the videos, add an else: for your final return of the added floats.

But, in reality, the else statement can be removed entirely :thumbsup:

Diar Selimi
Diar Selimi
1,341 Points
Diar Selimi
Diar Selimi
1,341 Points

maybe you wan't to call your defined function in the first return like return add(param1, param2)

def add(a, b,):

try:
    return add(float(1), float(2))
except SomeException as exception:
    return null
finally:
    return something