# Scientific Computing with Python Projects - Arithmetic Formatter

Tell us what’s happening:
I am unsure why my code for the Arithmetic Formatter is not working. The output console appears to show that they are correct, but the test says the code is not correct. This is what the console for first test says:

``````===================== FAILURES =====================
__ test_template[test_two_problems_arrangement1] ___

arguments = [['3801 - 2', '123 + 49']]
expected_output = '  3801      123\n-    2    +  49\n------    -----'
fail_message = 'Expected different output when calling "arithmetic_arranger()" with ["3801 - 2", "123 + 49"]'

@pytest.mark.parametrize('arguments,expected_output,fail_message', test_cases)
def test_template(arguments, expected_output, fail_message):
actual = arithmetic_arranger(*arguments)
>       assert actual == expected_output, fail_message
E       AssertionError: Expected different output when calling "arithmetic_arranger()" with ["3801 - 2", "123 + 49"]
E       assert '  3801      123\n-    2    +  49\n------    -----\n' == '  3801      123\n-    2    +  49\n------    -----'
E             3801      123
E           -    2    +  49
E         - ------    -----
E         + ------    -----
E         ?                +

*Because of the difference between the size of the plus and minus on this forum, it looks like they are offset, but in my console they look exactly identical.

def arithmetic_arranger(problems):
problem1=[]
problem2=[]
problem3=[]
problem4=[]
problem5=[]
n = 0
for problem in problems:
n = n + 1

if n >= 1:
problem1 = problems[0]
problem1 = problem1.split()
space1 = len(problem1[0]) - len(problem1[2])
str1a = problem1[0]
str1b = problem1[1] + ' ' + ' '*space1 + problem1[2]
max_str1 = max(len(str1a), len(str1b))
str1a = ' ' * (max_str1 - len(str1a)) + str1a
str1b = ' ' * (max_str1 - len(str1b)) + str1b
strA = str1a
strB = str1b
strC = '-'*len(str1b)
if n >= 2:
problem2 = problems[1]
problem2 = problem2.split()
space2 = len(problem2[0]) - len(problem2[2])
str2a = problem2[0]
str2b = problem2[1] + ' ' + ' '*space2 + problem2[2]
max_str2 = max(len(str2a), len(str2b))
str2a = ' ' * (max_str2 - len(str2a)) + str2a
str2b = ' ' * (max_str2 - len(str2b)) + str2b
strA = strA + ' '*4 + str2a
strB = strB + ' '*4 + str2b
strC = strC + ' '*4 + '-'*len(str2b)
if n >= 3:
problem3 = problems[2]
problem3 = problem3.split()
space3 = len(problem3[0]) - len(problem3[2])
str3a = problem3[0]
str3b = problem3[1] + ' ' + ' '*space3 + problem3[2]
max_str3 = max(len(str3a), len(str3b))
str3a = ' ' * (max_str3 - len(str3a)) + str3a
str3b = ' ' * (max_str3 - len(str3b)) + str3b
strA = strA + ' '*4 + str3a
strB = strB + ' '*4 + str3b
strC = strC + ' '*4 + '-'*len(str3b)
if n >= 4:
problem4 = problems[3]
problem4 = problem4.split()
space4 = len(problem4[0]) - len(problem4[2])
str4a = problem4[0]
str4b = problem4[1] + ' ' + ' '*space4 + problem4[2]
max_str4 = max(len(str4a), len(str4b))
str4a = ' ' * (max_str4 - len(str4a)) + str4a
str4b = ' ' * (max_str4 - len(str4b)) + str4b
strA = strA + ' '*4 + str4a
strB = strB + ' '*4 + str4b
strC = strC + ' '*4 + '-'*len(str4b)
if n >= 5:
problem5 = problems[4]
problem5 = problem5.split()
space5 = len(problem5[0]) - len(problem5[2])
str5a = problem5[0]
str5b = problem5[1] + ' ' + ' '*space5 + problem5[2]
max_str5 = max(len(str5a), len(str5b))
str5a = ' ' * (max_str5 - len(str5a)) + str5a
str5b = ' ' * (max_str5 - len(str5b)) + str5b
strA = strA + ' '*4 + str5a
strB = strB + ' '*4 + str5b
strC = strC + ' '*4 + '-'*len(str5b)
if n >= 6:
print("Error: Too many problems.")
exit()
strA = strA + '\n'
strB = strB + '\n'
strC = strC + '\n'
#print(strA)
#print(strB)
#print(strC)
arranged_problems = strA + strB + strC
#return print(f"{strA}\n{strB}\n{strC}\n")
return arranged_problems
``````

#The reason the commented out ‘return’ function is in the code is because I tried #removing the ‘\n’ from the strings above, and using a different method to get the #correct string, but it still did not work.

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