Palindrome
Skip Montanaro
skip at pobox.com
Thu Nov 13 22:47:07 EST 2003
Andrew> Gerrit Holl
>> Are you looking for:
>> 20:58:42:232:0 >>> def ispalindrome(s):
>> 20:58:42:232:0 ... return s == s[::-1]
Andrew> No. The OP wanted to strip special characters and
Andrew> normalize case, so that
Andrew> A man, a plan, a canal -- Panama!
Andrew> would be allowed as a palindrome.
Oh, then how about:
import re
def ispalindrome(s):
s = re.sub("[^A-Za-z0-9]+", "", s).lower()
return s == s[::-1]
for s in (
"A man, a plan, a canal -- Panama!",
"1234",
"123321",
"Madam, I'm Adam."):
print s, "->", ispalindrome(s)
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