[LeetCode][Python3] 125. Valid Palindrome

Problem :

https://leetcode.com/problems/valid-palindrome/description/

My Solution :

class Solution:

def isPalindrome(self, s):

"""

:type s: str

:rtype: bool

"""

i = 0

j = len(s)-1

while i < j:

while i < j and not s[i].isalnum():

i += 1

while i < j and not s[j].isalnum():

j -= 1

if s[i].lower() != s[j].lower():

return False

i += 1

j -= 1

return True

Comment :

Python str class는 isalnum, isalpha, isdigit, islower, isupper 등의 편리한 method를 가지고 있다.