Python - Palindrome Checker

A palindrome is a sequence that reads the same in either direction.

Here is function I wrote to check if a phrase is a palindrome:

import re

def is_palindrome(txt):
    txt = re.sub('\W+', '', txt).lower()
    return txt == txt[::-1]

phrase = "Go hang a salami, I'm a lasagna hog"
print is_palindrome(phrase)

>> True