class Solution(object):
def isPalindrome(self, s):
"""
:type s: str
:rtype: bool
"""
s = s.lower()
# print(s)
news = ""
# s[1].is
for i in range(len(s)):
if s[i].isalnum(): # 题目要求：只考虑字母和数字字符
news+=s[i]
# print(news)
# news = 'aba'
length = len(news)
for i in range(length//2):
if news[i] != news[length-i-1]:
return False
return True