user input list python

Question

I am trying to get the sum of the output_values, and it is giving me a traceback error

output_values = []
while True:
    user_input = input('Please type in your test grades, and follow your input by typing in "done"')
    if user_input == 'done':
        print('All done, here is your average')
        break
    ### here you will insert in the traceback error to prevent your code from crashing due to invalid input
    try:
        val_input = float(user_input)
        if val_input:
            output_values.append(user_input)
    except ValueError:
        print('You have typed in an invalid input, please type in your grade as a numerical digit')
        continue
print(output_values)
summation = sum(output_values)

Which line give you error?

Marcus.Aurelianus
– Marcus.Aurelianus

2018-07-18 02:22:51 +00:00
Commented Jul 18, 2018 at 2:22 — Marcus.Aurelianus
– Marcus.Aurelianus, Commented Jul 18, 2018 at 2:22

blhsing · Accepted Answer · 2018-07-18 02:03:00Z

1

You converted user_input from str to float and assign the returning value to val_input, and yet when you append to output_values you give it user_input instead of val_input, effectively discarding your conversion.

    val_input = float(user_input)
    if val_input:
        output_values.append(user_input)

Simply fix it with:

    val_input = float(user_input)
    if val_input:
        output_values.append(val_input)

answered Jul 18, 2018 at 2:03

blhsing

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