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

Carole Cox
Carole Cox
429 Points
Posted by Carole Cox
Carole Cox
429 Points

Hmmm..where am I going wrong?

I passed the first challenge with this code but when I put float() into the code, it started to fail. I tried having the arguments as float (num1, num2) but the challenge did not like that either. I appreciate any suggestion!

trial.py 
def add(num1,num2):
  float(num1)
  float(num2)
  add=num1+num2
  return(add)
Carole Cox
Carole Cox
429 Points
Carole Cox
Carole Cox
429 Points

Do I need a Try and except?

7 Answers

jcorum
jcorum
71,830 Points

Sorry, I missed your question about "try and except". Yes, for the next part:

def add(num1, num2):
  try:
    num1 = float(num1)
    num2 = float(num2)
  except ValueError:
    return None
  else:
    return num1 + num2
jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Carole, the problem is that float(num1) needs to be saved back to num1, etc for num2:

def add(num1, num2):

    num1 = float(num1)
    num2 = float(num2)

    return num1 + num2

The way you have it your float conversion is wasted. As you go on to use the unconverted num1 and num2.

Carole Cox
Carole Cox
429 Points
Carole Cox
Carole Cox
429 Points

WOW -newbie mistake! Thanks!

I am wet behind the ears!

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

No, it happens to us all!!

Carole Cox
Carole Cox
429 Points
Carole Cox
Carole Cox
429 Points

Thanks! I need all the encouragement I can get.

Carole Cox
Carole Cox
429 Points
Carole Cox
Carole Cox
429 Points

Ha Ha! how did you know I was fighting with that. I'm close! this is a BIG HELP!

Carole Cox
Carole Cox
429 Points
Carole Cox
Carole Cox
429 Points

Ha Ha! how did you know I was fighting with that. I'm close! this is a BIG HELP!