I have a question during programming using Python exception.

Hello, I'm a student learning Python.

I am writing a program that calculates the average by receiving a score from the user.

If you add a positive number as user_input, you add it to the list, and if you add a negative number, you get the sum and the average based on the list.

To calculate while there is no content in the list, use exception Zero Division Error: to receive the input value again.

If you enter non-numeric characters in user_input, you are trying to receive the input value again using exceptionValueError:.

Below is what we were working on.

def calculate_average(listsum, count):
    average = sum(listsum) / count
    return average

score = list()

try:
    user_input = int(input(') score. Enter a negative number to obtain the mean: ')))

except ValueError:
    print('Not a valid number. Please re-enter it.')
    user_input = int(input(') score. Enter a negative number to obtain the mean: ')))

except ZeroDivisionError:
    print('You did not enter a score to obtain the mean. Please re-enter it.')
    user_input = int(input(') score. Enter a negative number to obtain the mean: ')))

finally:
    while user_input >= 0:
        score.append(user_input)
        user_input = int(input(') score. Enter a negative number to obtain the mean: ')))


    if user_input < 0:
            average = calculate_average(score, len(score))
            print('sum:', '%'.1f' % sum(score))
            print('Average:', '%'.1f' % average)

The cord seems to be unnecessarily messy..

Once I just enter a positive number and then a negative number, the sum and the average I want are normally output.

However, whenever I try to make an exception, it keeps not working.

I think the order or usage of the placement is wrong

Can I ask for advice from masters? Thank you.

And one of the contents that was modified was

def decision():
    try:
        score_input = int(input(') score. Enter a negative number to obtain the mean: ')))
    except ValueError:
        print('Not a valid number. Please re-enter it.')
        decision()

There was also a way to create and use functions like this, but I think it's a little too much for my head right now. Please do it again ㅠ<

python3.4 try exception

2022-09-22 11:35

1 Answers

In Python try catch, final is the part that goes unconditionally regardless of whether a value error or division by zero is caught, that is, if a value other than a number, 0 goes in, the error comes out normally, and then the error goes in the final.

2022-09-22 11:35

If you have any answers or tips

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