Build an Arithmetic Formatter Project - Code Outputs Correctly but Failing Tests?

Python
1

Tell us what’s happening:

Hello. I am not the most experienced coder, and I know there are more efficient ways to execute this project, but I am sure my code meets the requirements and the tests are still counting as incorrect. How can I fix this? Do I need to rewrite the code using specific commands?

Thanks so much!

Your code so far

def arithmetic_arranger(problems, show_answers=False):

    #Error message for too many problems
    if len(problems) > 5:
        print('Error: Too many problems.')
        return


    operations = []
    #list of all operations
    for problem in problems:
        operation = problem.split(' ')[1]
        operations.append(operation)
    #print(operations)

    #Error message for invalid operation
    for operation in operations:
        if operation != '+' and operation != '-':
            print("Error: Operator must be '+' or '-'.")
            return

    numbers = []
    #list of all operands
    #throws error if number not a digit
    for problem in problems:
        num1 = problem.split(' ')[0]
        num2 = problem.split(' ')[2]
        if not num1.isdigit():
            print('Error: Numbers must only contain digits.')
            return
        if not num2.isdigit():
            print('Error: Numbers must only contain digits.')
            return
        numbers.append(int(num1))
        numbers.append(int(num2))
    #print(numbers)

    #error message for long numbers
    for number in numbers:
        if len(str(number)) > 4:
            print('Error: Numbers cannot be more than four digits.')
            return


    top_row = ''
    bottom_row = ''
    dashes = ''
    answers = ''
    #formatting top line
    #even index on top
    for i in range(0,len(numbers),2):
        space_width = max(len(str(numbers[i])),len(str(numbers[i+1])))+2
        top_row += str(numbers[i]).rjust(space_width)
        top_row += '    '
        dashes += '-' * space_width
        dashes += '    '
    j=0
    for k in operations:
        if k=='+':
            space_width = max(len(str(numbers[j])),len(str(numbers[j+1])))+2
            answers+=str((numbers[j]+numbers[j+1])).rjust(space_width)
            answers+='    '
            #print(answers)
            j+=2
        else:
            space_width = max(len(str(numbers[j])),len(str(numbers[j+1])))+2
            answers+=str((numbers[j]-numbers[j+1])).rjust(space_width)
            answers+='    '
            j+=2
    #print(top_row)
    #print(answers)

    #formatting bottom line
    for i in range(1,len(numbers),2):
        space_width = max(len(str(numbers[i])),len(str(numbers[i-1])))+1
        bottom_row += operations[i//2]
        bottom_row += str(numbers[i]).rjust(space_width)
        bottom_row += '    '
    #print(bottom_row)

    if show_answers:
        arranged_problems = '\n'.join((top_row, bottom_row,dashes,answers))
    else:      
        arranged_problems = '\n'.join((top_row, bottom_row,dashes))
    return print(arranged_problems)

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Challenge Information:

Build an Arithmetic Formatter Project - Build an Arithmetic Formatter Project

2

Welcome to the forum :wave:

1st problem is that you need to return a string, not a print function call

Next, use repr() to accurately compare the test outputs

print(repr(arithmetic_arranger(["3801 - 2", "123 + 49"])))
1 Like
3

Thank you, I will try this out!

1 Like