# Arithmetic_arranger - can't understand error codes

I am working on the Arithmetic Arranger problem and I don’t know what the errors I am getting actually mean or how to fix them. The core for loop works, but once I put into replit, I get weird errors that I can’t even understand.

``````import re

def arithmetic_arranger(problems, solve = False):

if len(problems) > 5:
return "Error: Too many problems."

top = ""
bottom = ""
newDash = ""
newSum = ""

for problem in problems:

if re.search("[*]", problem) or re.search("[/]", problem):
return "Error: Operator must be '+' or '-'"
if re.search("^/s[0-9].+-", problem):
return "Error: Numbers must only contain digits"
firstNumber = problem.split(' ')
operator = problem.split(' ')
secondNumber = problem.split(' ')
if len(firstNumber) >= 5 or len(secondNumber) >= 5:
return "Error: Numbers cannot be more than four digits."

sum =""
if(operator == "+"):
sum = str(int(firstNumber)+int(secondNumber))
else:
sum = str(int(firstNumber)-int(secondNumber))

length = max(len(firstNumber), len(secondNumber)) +2
topLine = str(firstNumber).rjust(length)
bottomLine = operator + str(secondNumber).rjust(length-1)
result = sum.rjust(length)
dash = ""
for y in range(length):
dash += "-"

if problem != problems[-1]:
top += topLine + "    "
bottom += bottomLine + "    "
newDash += dash + "    "
newSum += result + "    "
else:
top += topLine
bottom += bottomLine
newDash += dash
newSum += result

if solve:
answer = (top + "\n" + bottom + "\n" + newDash + "\n" + newSum)
else:
answer = (top + "\n" + bottom + "\n" + newDash)

``````

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Challenge: Arithmetic Formatter

please share the tests output you get from the test suite

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (`</>`) to add backticks around text.

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).

Hey just finishes the first python cert, a couple months ago. Most of the error codes are because the test output != your output. That is, your solution isn’t equal to what the test file wants to you get. Try to look like by line for the keyword “!=” or “does not equal”… see what you are suppose to be getting and how you can fix your code.

I still vividly remember, going line by line with the test code to make sure spaces, etc matched up, for each case.

If you are working offline, you can also download/copy the test solutions, then enter them into your code and compare them one by one. That is what I would recommend, as I did all the code offline first.

1 Like

Thanks for the advice! I actually figured it out but thank you!

2 Likes

Thanks, I forgot to add a period to the end of an error message and had to tweak my reg ex formatting and it works now!

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