code: def longestPalindrome(self, s: str) -> str:
      maxPal = ""
  
      for index, word in enumerate(s):
          maxPal = max(
              maxPal,
              self.expandFromCenter(s, index, index),
              self.expandFromCenter(s, index, index + 1),
              key=len,
          )
      return maxPal
  
label_desc: Use image node_id 1 for calling the Solution obj's underlying member method code with example usage: obj.longestPalindrome(s) and returns: maxPal