08 2014 档案

摘要:判断字符串是否是回文的,即是否中心对称的:>>>return s[::-1] == s对称返回True, 否则返回False 阅读全文
posted @ 2014-08-12 10:55 第八片叶子 阅读(129) 评论(0) 推荐(0)
摘要:1\string are immutable, which means you can't change an existing string.>>>greeting = 'Hello world!'>>>greeting[0] = 'J'TypeError: object does not sup... 阅读全文
posted @ 2014-08-11 15:52 第八片叶子 阅读(131) 评论(0) 推荐(0)