Write a Static Method Utility for Validation

Summary

Implement a static method to check palindromes that ignores case and non-alphanumeric characters.

Problem statement

Create a class StringUtils with a static method is_palindrome(s) that returns True if the string s is a palindrome when non-alphanumeric characters are ignored and case differences are ignored. For example, "A man, a plan, a canal: Panama" should be considered a palindrome. The method should return a boolean value and must be a static method (i.e., decorated with @staticmethod). Do not add any instance or class attributes; the functionality should be provided through a static method because it doesn't rely on instance or class state.

Task

Learn how to declare and use a @staticmethod for a utility that doesn't depend on instance or class state.

Examples

Input format

A single call to StringUtils.is_palindrome with a string argument.

Output format

Return a boolean: True if the processed string is a palindrome, otherwise False.

Constraints

The method must be defined as a static method (use @staticmethod). The input string may be empty and may contain letters, digits, punctuation and spaces.

Samples