Build an Arithmetic Formatter Project - Build an Arithmetic Formatter Project

Python
1

Tell us what’s happening:

the output seems to be correct but doesn’t pass the test

Your code so far

def arithmetic_arranger(problems, show_answers=False):
    if len(problems) > 5:
        return 'Error: Too many problems.'

    one = ''
    two = '\n'
    three = '\n'
    four = '\n'

    for problem in problems:
        prob = problem.split()

        if prob[1] == '*' or prob[1] == '/':
            return "Error: Operator must be '+' or '-'."
        
        if len(prob[0]) > 4 or len(prob[2]) > 4:
            return 'Error: Numbers cannot be more than four digits.'

        if not prob[0].isdigit() or not prob[2].isdigit():
            return 'Error: Numbers must only contain digits.'

        n1 = prob[0]
        op = prob[1]
        n2 = prob[2]
        answer = 0

        n1_len = len(prob[0])
        n2_len = len(prob[2])

        if op == '+':
            answer = int(n1) + int(n2)
        else:
            answer = int(n1) - int(n2)

        ans_len = len(str(answer))
        dash_len = 2 + max(n1_len, n2_len)
        n1_gap = (dash_len - n1_len) * ' '
        op_alignment = max(n1_len, n2_len) + 1
        n2_gap = (op_alignment - n2_len) * ' '
        total_space = len(n2_gap) + 1 + n2_len
        op_gap = (dash_len - total_space) * ' '
        ans_gap = (dash_len - ans_len) * ' '
        gap=' '*4

        one += f"{n1_gap}{n1}{gap}"
        two += f"{op_gap}{op}{n2_gap}{n2}{gap}"
        three += f"{dash_len*'-'}{gap}"
        four += f"{ans_gap}{answer}{gap}"

    if show_answers:
        result = one + two + three + four
    else:
        result = one + two + three

    return result

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Challenge Information:

Build an Arithmetic Formatter Project - Build an Arithmetic Formatter Project

2

it needs to be exactly the same including all spacing and newline characters.

Check the dev console (press F12) for a more detailed error msg

1 Like
3

based on your code, make sure the gap is not 4 spaces for the last element in the list of problems.

You may want to change the for loop statement to detect the last element

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4

thanks! i actually figured this out after sometime, it’s with the last 4 spaces

1 Like