My favorite palindrome (TheAlgorithms#7455)

* My favorite palindrome

* updating DIRECTORY.md

* Update is_palindrome.py

* Update is_palindrome.py

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* Update strings/is_palindrome.py

Co-authored-by: Caeden Perelli-Harris <caedenperelliharris@gmail.com>

* Update is_palindrome.py

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Caeden Perelli-Harris <caedenperelliharris@gmail.com>

Author: 4 people

strings/is_palindrome.py

@@ -1,9 +1,8 @@
 def is_palindrome(s: str) -> bool:
     """
-    Determine whether the string is palindrome
-    :param s:
-    :return: Boolean
-    >>> is_palindrome("a man a plan a canal panama".replace(" ", ""))
+    Determine if the string s is a palindrome.
+
+    >>> is_palindrome("A man, A plan, A canal -- Panama!")
     True
     >>> is_palindrome("Hello")
     False
@@ -14,15 +13,15 @@ def is_palindrome(s: str) -> bool:
     >>> is_palindrome("Mr. Owl ate my metal worm?")
     True
     """
-    # Since Punctuation, capitalization, and spaces are usually ignored while checking
-    # Palindrome,  we first remove them from our string.
-    s = "".join([character for character in s.lower() if character.isalnum()])
+    # Since punctuation, capitalization, and spaces are often ignored while checking
+    # palindromes, we first remove them from our string.
+    s = "".join(character for character in s.lower() if character.isalnum())
     return s == s[::-1]
 
 
 if __name__ == "__main__":
-    s = input("Enter string to determine whether its palindrome or not: ").strip()
+    s = input("Please enter a string to see if it is a palindrome: ")
     if is_palindrome(s):
-        print("Given string is palindrome")
+        print(f"'{s}' is a palindrome.")
     else:
-        print("Given string is not palindrome")
+        print(f"'{s}' is not a palindrome.")