python - Checking Palindrome text, with ignored punctuation marks, spaces and case -

homework exercise: checking whether text palindrome should ignore punctuation, spaces , case. example, "rise vote, sir." palindrome our current program doesn't is. can improve above program recognize palindrome?

origin code:

def reverse(text):     return text[::-1] def is_palindrome(text):     return text == reverse(text)  = input('enter text: ')   if (is_palindrome(something)):     print("yes, palindrome")  else:     print("no, not palindrome") 

my try:

import re  def reverse(text):     global words     words = text.split()     return words[::-1]  def is_palindrome(text):     return words==reverse(text)  = input('enter text: ') if (is_palindrome(something)):     print("yes, palindrome") else:     print("no, not palindrome") 

error:

enter text: jfldj traceback (most recent call last): file "/users/apple/pycharmprojects/problem solving/user_input.py", line 13, in <module> print("yes, palindrome") file "/users/apple/pycharmprojects/problem solving/user_input.py", line 10, in is_palindrome  nameerror: name 'words' not defined 

how should change code?

latest code:

import string  def remove_punctuations(word):     return "".join(i.lower() in word if not in string.ascii_letters)  def reverse(text):     return text[::-1]  def is_palindrome(text):     text = remove_punctuations(text)     return text == reverse(text)  = input('enter text: ') if (is_palindrome(something)):     print("yes, palindrome" else:     print("no, not palindrome") 

no matter input, output yes.

enter text: hggjkgkkkk yes, palindrome 

what's wrong?

to ignore punctuations, spaces , case of given text need define function remove_punctuations() takes word parameter , returns word lower case characters, remove punctuation marks , removed spaces.

to remove unwanted characters need iterate on given text, if current character falls in strings.ascii_letters , generate character converting lower caps using str.lower() method. using "".join() method concatenate generated str elements.

import string  def remove_punctuations(word):     return "".join(i.lower() in word if in string.ascii_letters)  def reverse(text):     return text[::-1]  def is_palindrome(text):     text = remove_punctuations(text)     return text==reverse(text)  = "rise vote, sir."  if (is_palindrome(something)):     print("yes, palindrome") else:     print("no, not palindrome")