Comments on: Detecting Palindromes With Python, Revisited

By: iffy

iffy — Tue, 29 Apr 2008 14:51:57 +0000

This is a neat little example. I used this as a basis for another version using only list comprehensions — one of my favorite features of Python.

By: Phil Crissman

Phil Crissman — Wed, 23 Apr 2008 08:48:56 +0000

Nice; I was assuming there was a better way to do that. Thanks for the tip! Apparently, I need a regex refresher.

By: mrben

mrben — Wed, 23 Apr 2008 08:24:23 +0000

I think there are probably a couple of different ways of doing this - there is probably a lambda-type function that will use string.replace for all the characters in string.punctuation (which is a constant list of all the punctuation), which would remove the need for the regex.

However, with the regex, you can use the \W shortcut for non-alphanumeric characters. Thus the line becomes:

q = re.sub(”\W”, “”, q).lower()