If a word or sentence reads the same way forward and backward, then it is a palindrome. A small admonition is in place, whitespaces and punctuation marks can be ignored. Also, all the letters should be in one case, lower or upper, your choice. Ideal for Python to show off its prowess with string handling.
# check if a phrase is a palindrome # tested with Python24 vegaseat 10sep2006 def isPalindrome(phrase): """ take a phrase and convert to all lowercase letters and ignore punctuation marks and whitespaces, if it matches the reverse spelling then it is a palindrome """ phrase_letters = [c for c in phrase.lower() if c.isalpha()] print phrase_letters # test return (phrase_letters == phrase_letters[::-1]) phrase1 = "A man, a plan, a canal, Panama!" # example with punctuation marks if isPalindrome(phrase1): print '"%s" is a palindrome' % phrase1 else: print '"%s" is not a palindrome' % phrase1 print phrase2 = "Madam in Eden I'm Adam" if isPalindrome(phrase2): print '"%s" is a palindrome' % phrase2 else: print '"%s" is not a palindrome' % phrase2
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