python 1108. Defanging an IP Address 思想:设置一个空字符串,对已有的地址进行字符串匹配,匹配到’.‘时,将’[.]'加到字符串中,否则,加入地址中其他字符。 class Solution(object): def defangIPaddr(self, address): """ :type address: str :rtype: str """ a = '' for i in address: if i=='.': a+='[.]' else: a+=i return a