Perfect_numbers AssertionError: ValueError not raised

Programming Python
,
1

Hello,
I am working on perfect_numbers exercise
the last two tests which test the raise exception don’t pass : I have the message “ValueError not raised”. I don’t understand why.
below my code:


    try:
        if number >= 1:
            somme = 0
    
            divisors = []
            if number>1 :
                limit = int(math.sqrt(number))
                i = 2
                while i <= limit  :
                    if number%i == 0:
                        divisors.append(i)
                        if i!=number/i:
                            divisors.append(number/i)
                    i = i+1
    
                for n in divisors :
                    somme+=n
                somme = somme + 1
        
            if somme == number :
                return "perfect"
            elif somme > number :
                return "abundant"
            else:
                return "deficient"
        else:
           raise ValueError("Classification is only possible for positive integers.")
    except ValueError as err:
        print(err)

thank you for help

2

You’ll have to copy/paste your code inside a code block (triple backticks) so we can see it, because the link you’ve shared only works for you.

```
// the code goes here
```

Also, did you read all the instructions carefully?

This particular exercise requires that you use the raise statement to “throw” a ValueError if the classify() function is passed a number that is not a positive integer. The tests will only pass if you both raise the exception and include a message with it.

To raise a ValueError with a message, write the message as an argument to the exception type:

# if a number to be classified is less than 1.
raise ValueError("Classification is only possible for positive integers.")
3

Okay, so having seen the code, here’s a hint:
The function is expected to raise an error if the input is less than 1. What does your implementation do in this case? Take a look at the try/except block specifically.

4

Hi @NunoPIRES :wave:

To tag onto Cool-Katt’s hint: We never, ever (in any exercise we have on the track so far) have you print anything.

Nor do we have more than a few exercises that require that you use a try.....except — and this exercise is not one of them.

Not that you can’t use a try.....except — but you need to handle the error in a way that the test can “see” it. Right now, test is failing because the error message that’s raised never gets to where the test can validate it.

5

thank you for your answers, I have finally fixed the problem by adding “raise” in last line of the except block
I will keep in mind for the other exercise that no exercise require try...except
Thank you again for your help

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