Build an Arithmetic Formatter Project - Build an Arithmetic Formatter Project

Python
1

Tell us what’s happening:

My codes failed for the last two tests, it seems like for the last two test my code should have a special requirement the dashes should not be printed after the result is displayed, how can i get that done please.
the answer should be like that:arithmetic_arranger([“3 + 855”, “988 + 40”], True) should return 3 988\n+ 855 + 40\n----- -----\n 858 1028.
but mine is this: 3 988

  • 855 + 40

858 1028

Your code so far

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

    line1 = ""
    line2 = ""
    line3 = ""
    line4 = ""

    for problem in problems:
        problem_item =  problem.replace(" ", "")

        if "+" in problem_item:
            problem_item = problem_item.split("+")
            operator = "+"
        elif "-" in problem_item:
            problem_item = problem_item.split("-")
            operator = "-"
        else:
            return "Error: Operator must be '+' or '-'."

        #check for non-digit operands
        if not(problem_item[0].isdigit() and problem_item[1].isdigit()):
            return 'Error: Numbers must only contain digits.'
        if len(problem_item[0]) > 4 or len(problem_item[1]) > 4:
            return 'Error: Numbers cannot be more than four digits.'

        align = max([len(problem_item[0]), len(problem_item[1])]) + 2

        if show_answers:
            result = str(eval(problem_item[0] + operator + problem_item[1]))

            line4 += result.rjust(align) + "    "
        
        line1 += problem_item[0].rjust(align) + "    "
        line2 += operator + problem_item[1].rjust(align - 1) + "    "
        line3 += "-"*(align) + "    "
    
    #remove trailling whitespace of each line
    line1 = line1.rstrip()
    line2 = line2.rstrip()
    line3 = line3.rstrip()

    final_string_format = "\n".join([line1, line2, line3])
    if show_answers:
        line4 = line4.rstrip()
        final_string_format += "\n" + line4 + "\n" + line3
    
    return final_string_format

print(arithmetic_arranger(arithmetic_arranger(["3 + 855", "988 + 40"], True))

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Challenge Information:

Build an Arithmetic Formatter Project - Build an Arithmetic Formatter Project

2

I always suggest to people to look at the detailed console logs in the browser console (F12 to open it) and copy the output to the forum or to a notepad so you can see the exact characters that need to be added/removed.

3

I haven’t checked both of your failing tests but I can see what’s wrong with the first one.
Here’s your output followed by the expected output:

Untitled

None of your problems should have a second line of dashes at the bottom.

4

I found the solution, i should have corrected this line: it should be like that: - removed