spark: add palindrome checker utility

wizard-work/spark/palindrome.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+"""Palindrome checker - returns 0 if palindrome, 1 otherwise."""
+import sys
+
+def is_palindrome(s: str) -> bool:
+    """Check if string is palindrome (ignoring case, non-alphanumeric)."""
+    cleaned = ''.join(c.lower() for c in s if c.isalnum())
+    return cleaned == cleaned[::-1]
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print("Usage: python3 palindrome.py <string>")
+        sys.exit(2)
+    result = is_palindrome(sys.argv[1])
+    print(f"{sys.argv[1]!r} is {'a palindrome' if result else 'not a palindrome'}")
+    sys.exit(0 if result else 1)