def is_palindrome(s: str) -> bool: return (x := [*map(lambda z: z.lower(),filter(lambda y: y.isalpha(),[*s]))]) == x[::-1]import string- def is_palindrome(s: str) -> bool:
forward = s.lower().translate(str.maketrans('', '', string.punctuation + ' '))return forward == forward[::-1]- return (x := [*map(lambda z: z.lower(),filter(lambda y: y.isalpha(),[*s]))]) == x[::-1]