Build an Arithmetic Formatter Project - Build an Arithmetic Formatter Project

Python
1

Tell us what’s happening:

I don’t understand why it doesn’t work. My code works, but when I run the tests, it gives me an ‘X’ saying it doesn’t. Unless I’m supposed to make it print ex:’ 32 1 45 123 988\n- 698 - 3801 + 43 + 49 + 40\n----- ------ ---- ----- -----\n -666 -3800 88 172 1028’, I don’ understand the issue.

Your code so far

def arithmetic_arranger(problems, argument2 = False):
    equations = problems
    problems = [e.replace(" ", "") for e in equations]

    for problem in problems:
        if '*' in problem or '/' in problem:
            return "Error: Operator must be '+' or '-'."

    for problem in  problems:
        for n in problem:
            if n not in [' ', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '+', '-']:
                return 'Error: Numbers must only contain digits.'
    
    if argument2 is not True:
        if len(problems) > 4:
            return 'Error: Too many problems.'

    operator_positions = []
    while len(operator_positions) != len(problems):
        for problem in problems:
            position_operator = 0
            for n in problem: 
                if n in ['+', '-']:
                    operator_positions.append(position_operator)
                    break
                position_operator += 1

    length_numbers = []
    for f, problem in enumerate(problems):
        x = len(problem[:operator_positions[f]])
        length_numbers.append(x)
        y = len(problem[operator_positions[f] + 1:])
        length_numbers.append(y)
    for n in length_numbers:
        if n > 4:
            return 'Error: Numbers cannot be more than four digits.'

    firstline = ''
    secondline = ''
    dashes = ''
    results = ''
    for f, problem in enumerate(problems):
        right = problem[:operator_positions[f]]
        operator = problem[operator_positions[f]]
        left = problem[operator_positions[f] + 1:]
        firstline += f"{right:>5}   "
        secondline += f"{operator}{left:>4}   "
        dashes += "-----"+'   '
        if argument2:
            if operator == '+':
                result = int(right) + int(left)
            elif operator == '-':
                result = int(right) - int(left)
            results += f"{result:>5}   "
 
    arranged_problems = f"{firstline}\n{secondline}\n{dashes}"
    if argument2:
        arranged_problems += f"\n{results}"

    return arranged_problems


print(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

arithmetic_arranger(["3801 - 2", "123 + 49"]) should return 3801 123\n- 2 + 49\n------ ----- .

You can see what your function returns in that format using repr, like repr(arithmetic_arranger(["3801 - 2", "123 + 49"])) returns ' 3801 123 \n- 2 + 49 \n----- ----- '

so let’s compare the two:

' 3801     123   \n-   2   +  49   \n-----   -----   '
'  3801      123\n-    2    +  49\n------    -----'

do you see some differences? the first line is yours, the second one is the expected
the quotes around are not a difference,

3

It works now,
Thank you!