Build an Arithmetic Formatter Project - Build an Arithmetic Formatter Project

Python
1

Tell us what’s happening:

Arithmetic Formatter Project:
My output shows the same result like it should be. I have also checked for blank spaces with “repr()” function, which was mentioned in forum, but it still won’t work.
I would appreciate some help to learn, what is wrong in my code.

Your code so far

def arithmetic_arranger(problems, show_answers=False):

    line_1 = ""
    line_2 = ""
    line_3 = ""
    line_4 = ""
# Abfrage Bedingungen für Error - Anzahl Probleme
    if len(problems) > 5:
         raise ValueError('Error: Too many problems.')
    for pro in problems:
        first_number = pro.split()[0]
        second_number = pro.split()[2]
        operator = pro.split()[1]
# Abfrage Bedingungen für Error - Operator-Typ / nur Zahlen / max 4 Ziffern
        if operator != '+' and operator != '-':
             raise ValueError("Error: Operator must be '+' or '-'")
        if first_number.isdigit() == False or second_number.isdigit() == False:
            raise ValueError("Error: Numbers must only contain digits.")
        if len(first_number) > 4 or len(second_number) > 4:
            raise ValueError('Error: Numbers cannot be more than four digits.')
# Ermittlung max Länge der Nummern
        max_number_length = len(str(max(int(first_number), int(second_number))))
# Lösen der Gleichung
        if operator == '+':
            result = int(first_number) + int(second_number)
        elif operator == '-':
            result = int(first_number) - int(second_number)
        result = str(result)

# Bildung der Reihen  
        line_1 += f"{first_number:>{max_number_length+2}}{' '*4}"
        line_2 += f"{operator}{second_number:>{max_number_length+1}}{' '*4}"
        line_3 += f"{'-'* (max_number_length+2)}{' '*4}"
        line_4 += f"{result:>{max_number_length+2}}{' '*4}"

# Anzeigen der Reihen
    print(line_1.rstrip())
    print(line_2.rstrip())
    print(line_3.rstrip())
    if show_answers == True:
        print(line_4.rstrip())
      
    return problems
#arithmetic_arranger(["3801 - 2", "123 + 49"])
#arithmetic_arranger(["1 + 2", "1 - 9380"])
#arithmetic_arranger(["3 + 855", "3801 - 2", "45 + 43", "123 + 49"])
#arithmetic_arranger(["11 + 4", "3801 - 2999", "1 + 2", "123 + 49", "1 - 9380"])
#arithmetic_arranger(["3 / 855", "3801 - 2", "45 + 43", "123 + 49"])
#arithmetic_arranger(["24 + 85215", "3801 - 2", "45 + 43", "123 + 49"])
#arithmetic_arranger(["98 + 3g5", "3801 - 2", "45 + 43", "123 + 49"])
#arithmetic_arranger(["3 + 855", "988 + 40"], True)
#arithmetic_arranger(["32 - 698", "1 - 3801", "45 + 43", "123 + 49", "988 + 40"], True)

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Challenge Information:

Build an Arithmetic Formatter Project - Build an Arithmetic Formatter Project

2

look at what your method returning, is it returning correct field, i.e is it returning result or something else?

3

try writing
print("my function output is", arithmetic_arranger(["3801 - 2", "123 + 49"]))

is it returning what you want it to return?

4

Yes, it looks like in the task description

5

Do you refer to the line “return problems”?

Not sure if I understood your question correctly.

But the number / my output is arranged like in the task description.

6

are you sure it looks like that?

the thing printed to the console is my function output is ['3801 - 2', '123 + 49'] and I do not see anywhere that you are asked to return ['3801 - 2', '123 + 49'] from your function

7

Sorry I was wrong and I know my mistake now.

I had return the variable “problems” at the end.

I have generated a new variable for my solutions and set return to this variable.

Now it works.

Thank you for pointing out the problem.