# Scientific Computing with Python Projects - Arithmetic Formatter

Tell us what’s happening:
Hi, guys!
When I run my code on Replit it fails on 6 tests and it seems to be because of the formatting.
But I’m not finding any indentation error or wrong spaces between the elements.
Could you guys, please, help me?

``````    # Checking the lenght of the problems
if len(problems) > 5:
return "Error: Too many problems."
else:
firstLine = ''
secondLine= ''
dashes = ''
results = ''
for operation in range(0, len(problems)):
[firstItem, operator, secondItem] = problems[operation].split(" ")
# Checking if the numbers has the max of 4 digits
if len(firstItem) > 4 or len(secondItem) > 4:
return "Error: Numbers cannot be more than four digits."
# Checking if the numbers are numerics
elif firstItem.isnumeric() == False or secondItem.isnumeric() == False:
return "Error: Numbers must only contain digits."
# Checking if the operator is equal to '+' or '-'
elif operator != '+' and operator != '-':
return "Error: Operator must be '+' or '-'."
# If the length of the first and second operand are equal
if len(firstItem) == len(secondItem):
firstItem = firstItem.rjust(len(firstItem) + 2, " ")
secondItem = secondItem.rjust(len(secondItem) + 1, " ")
# If the first operand is greatter than the second operand
elif len(firstItem) > len(secondItem):
space = len(secondItem) + 1 + (len(firstItem) - len(secondItem))
secondItem = secondItem.rjust(space, " ")
firstItem = firstItem.rjust(len(firstItem) + 2, " ")
# If the second operand is greatter than the first operand
elif len(secondItem) > len(firstItem):
space = len(firstItem) + 2 + (len(secondItem) - len(firstItem))
firstItem = firstItem.rjust(space, " ")
secondItem = secondItem.rjust(len(secondItem) + 1, " ")
# Creating the dashes line
dash = ''
while len(dash) != len(firstItem):
dash = dash + "_"
# Calculating the result
if operator == "+":
result = str(int(firstItem) + int(secondItem))
elif operator == "-":
result = str(int(firstItem) - int(secondItem))
# Adding the spaces to the result
space = len(result) + (len(firstItem) - len(result))
result = result.rjust(space, " ")
secondItem = operator + secondItem
if (operation + 1) != len(problems):
firstLine += firstItem  + "    "
secondLine += secondItem  + "    "
dashes += dash + "    "
results += result + "    "
else:
firstLine += firstItem
secondLine += secondItem
dashes += dash
results += result
# Returning the result
firstLine.rstrip()
secondLine.rstrip()
dashes.rstrip()
results.rstrip()
if showResult==False:
finalResult = firstLine + "\n" + secondLine + "\n" + dashes
elif showResult==True:
finalResult = firstLine + "\n" + secondLine + "\n" + dashes + "\n" + results
return finalResult
``````

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Challenge: Scientific Computing with Python Projects - Arithmetic Formatter

For `arithmetic_arranger(['3801 - 2', '123 + 49'])`, your function returns:

``````'  3801      123\n-    2    +  49\n______    _____'
``````

but should be returning:

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

One of the rules states:

There should be dashes at the bottom of each problem.

You are not using dashes.

Thank you, Randell Dawson!!
It worked!    