Python Notebook Test

This python code is from my previous CSP tri3 menu project. If it works correctly, it should correctly analyze these palindromes and filter out any irrelevant characters.

class Palindrome:
  def __init__(self):
        self.filtered = ""
        self.paliBool = True

  def __call__(self, n):
    self.filtered = ""
    self.paliBool = True
    # Filters the string for letters only and appends them to the filtered string
    for i in n:
      if i.isalpha():
        self.filtered += i
    # For loop for palindrome finding
    
    print("="*45, "\nString: ", n,"\n" , '-'*44)
    for i in range(0, int(len(self.filtered)/2)):
      
      # Sets a to the lowercase of the letter that is i position in the string
      a = self.filtered[i].lower()
      # Sets b to the lowercase of the letter that is i amount starting from the end of the string
      b = self.filtered[(len(self.filtered) - i - 1)].lower()
      if a != b:
        # Breakpoint if the letters do not match to state it is not a palindrome
        self.paliBool = False
        print("'" + n + "'", "is not a palindrome at position " + str(i) +  " because", a, "!=", b)
        break
    # Print statement if the word is a palindrome (boolean stayed true)
    if self.paliBool:
      print("'" + n + "'", "is a palindrome!")
    

def pali_tester():
  pali = Palindrome()
  print("")
  # racecar tester, should output true
  pali("racecar")
  # test for case and symbol sensitivity, should output true
  pali("rACe_cA--R")
  # not a palindrome, should be false
  pali("racing car")
  # another test for space/symbol/case sensitivity, should be true
  pali("A man, a plan, a canal -- Panama!")
  print("")

pali_tester()

============================================= 
String:  racecar 
 --------------------------------------------
'racecar' is a palindrome!
============================================= 
String:  rACe_cA--R 
 --------------------------------------------
'rACe_cA--R' is a palindrome!
============================================= 
String:  racing car 
 --------------------------------------------
'racing car' is not a palindrome at position 3 because i != g
============================================= 
String:  A man, a plan, a canal -- Panama! 
 --------------------------------------------
'A man, a plan, a canal -- Panama!' is a palindrome!