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

vvsr sashank
vvsr sashank
1,393 Points
Posted by vvsr sashank
vvsr sashank
1,393 Points

what do I have to do in task 3?

def add(num1,num2): return float(num1)+float(num2)

trial.py 
def add(num1,num2):
try:
    return float(num1)+float(num2)
except ValueError:
    return None
else:
    return None
Nicolas Bassano
Nicolas Bassano
2,125 Points
Nicolas Bassano
Nicolas Bassano
2,125 Points

Hi!

mmmm I wonder how did you get to task 3??

Can you share the code for task 1 and 2?

vvsr sashank
vvsr sashank
1,393 Points
vvsr sashank
vvsr sashank
1,393 Points

def add(num1,num2):

try: return float(num1)+float(num2)

except ValueError: return None

else: return None

2 Answers

Steven Parker
Steven Parker
231,007 Points
Steven Parker
Steven Parker
231,007 Points

Now you need a try block to allow the function to handle errors gracefully.

There's a good example of putting a try sequence together about 1 minute into the video The Exception to the Rule. The main difference in the challenge is that you won't be using print, just another return with a *None value.

You can leave your current return as-is, and you won't need the else.

Nicolas Bassano
Nicolas Bassano
2,125 Points
Nicolas Bassano
Nicolas Bassano
2,125 Points

As Steven said: the last else is not nedded

Plus, notice that you have an indentation problem on line 2 hence indentation problems for the rest of the code.

You were nearly there, keep at it.

BTW, the code should look like this.......

def add(num1,num2):
    try:
        return float(num1) + float(num2)
    except ValueError:
        return(None)