# Scientific Computing with Python Projects - Arithmetic Formatter

### Tell us what’s happening:

my algorithm gives right results but it stills giving me an error

### Your code so far

``````def arithmetic_arranger(problems, show_answers=False):
formatted_lines = []

if len(problems) > 5:
return 'Error: Too many problems.'
for problem in problems:
# Split the problem into operands and operator
operand1, operator, operand2 = problem.split()

# Validate the format of the problem
if operator not in ['+', '-']:
return "Error: Operator must be '+' or '-'."

if not (operand1.isdigit() and operand2.isdigit()):
return "Error: Numbers must only contain digits."

if len(operand1) > 4 or len(operand2) > 4:
return "Error: Numbers cannot be more than four digits."
# Determine the maximum length of the operands
if len(operand1) < len(operand2):
d = len(operand2) - len(operand1)
else:
d = 0
formatted_lines.append(f"{' '*(2 + d)}{operand1}    ")

# If show_answers is True, append the result
formatted_lines.append(f'\n')
for problem in problems:
operand1, operator, operand2 = problem.split()
if len(operand2) < len(operand1):
d = len(operand1) - len(operand2)
else:
d = 0
formatted_lines.append(f"{operator}{' '*(1 + d)}{operand2}    ")

formatted_lines.append(f'\n')

for problem in problems:
operand1, operator, operand2 = problem.split()
max_length = max(len(operand1), len(operand2))
formatted_lines.append(f"{'-' * (max_length + 2)}    ")
formatted_lines.append(f'\n')
for problem in problems:
operand1, operator, operand2 = problem.split()
max_length = max(len(operand1), len(operand2))
if operator == '+':
result = int(operand1) + int(operand2)
else:
result = int(operand1) - int(operand2)
formatted_lines.append(f"{' '*((max_length +2)-len(str(result)))}{result}    ")

# Join the formatted lines with proper spacing
return ''.join(formatted_lines).rstrip()
else:
return ''.join(formatted_lines[:3]).rstrip()
print(arithmetic_arranger(["3 + 855", "988 + 40","12 - 876"], True))

``````

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### Challenge Information:

Scientific Computing with Python Projects - Arithmetic Formatter

if you press F12 you can see more details from the tests. You have extra spaces at the end of each line that you should not have there