Scientific Computing with Python Projects - Arithmetic Formatter problem - not working

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def arithmetic_arranger(problems, showAns = False):
if len(problems)>5:
return “Error: Too many problems.”
else:
arranged_problems =
for i in problems:
x = i.split()
n1 = x[0]
n2 = x[2]
operand = x[1]

  if operand not in ["+", "-"]:
    return "Error: Operator must be '+' or '-'." 
  else:
    for digit in n1:
      if digit not in ["0","1","2","3","4","5","6","7","8","9"]:
        return "Error:  Numbers must only contain digits." 
      else: 
        continue

    for digit in n2:
      if digit not in ["0","1","2","3","4","5","6","7","8","9"]:
        return "Error: Numbers must only contain digits." 
      else: 
        continue

    if len(n1)>4 or len(n2)>4:
      return "Error: Numbers cannot be more than four digits."
    else: 

        if operand == '+':
          answer = int(n1) + int(n2)
        else: 
          answer = int(n1) - int(n2)
        
        width = max(len(n1),len(n2)) +2
        topLine = str(n1.rjust(width))
        secondLine =  str(operand + " " + n2)
        dashLine = str("-" * width)
        answerLine = str(answer).rjust(width)
        
        if showAns == True: 
          arranged_problems.append(topLine + "\n" + secondLine + "\n" + dashLine + "\n" + answerLine)
        else: 
          arranged_problems.append(topLine + "\n" + secondLine + "\n" + dashLine)


return arranged_problems