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