leetcode 【 Reverse Words in a String 】python 实现

题目：

Given an input string, reverse the string word by word.

For example,
Given s = "the sky is blue",
return "blue is sky the".

代码：oj在线测试通过 Runtime: 172 ms

 class Solution:
     # @param s, a string
     # @return a string
     def reverseWords(self, s):
         words = s.split(' ')

         if len(words) < 2 :
             return s

         tmp = ""
         for word in words:
             word = word.replace(' ','')
             if word != "" :
                 tmp = word + " " + tmp

         tmp = tmp.strip()

         return tmp

思路：

把中间多个空格考虑去除了就OK了

最后用strip()函数把首位的空白去了