[leetCode] 125. Valid Palindrome (Python)

Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.

 

Note: For the purpose of this problem, we define empty string as valid palindrome.

 

Example 1:

Input: "A man, a plan, a canal: Panama"
Output: true

Example 2:

Input: "race a car"
Output: false

Solution

import re

class Solution:
    def isPalindrome(self, s: str) -> bool:
        s = s.lower()
        
        text = re.sub('[^a-zA-Z0-9]','',s)
        
        return text == text[::-1]

 

SOMJANG/CODINGTEST_PRACTICE