LeetCodeOJ--Reverse Words in a String(python版本)

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

For example,

Given s = "​​the sky is blue​​",

return "​​blue is sky the​​".

​​click to show clarification.​​

Clarification:

• What constitutes a word?
  A sequence of non-space characters constitutes a word.
• Could the input string contain leading or trailing spaces?
  Yes. However, your reversed string should not contain leading or trailing spaces.
• How about multiple spaces between two words?
  Reduce them to a single space in the reversed string.

1.测试版本代码：

# -*- coding: cp936 -*-
s = " tian zhai  xing  "
print "Before s:",s
def reverseWords(s):
    L = s.split() #单词拆分成列表
    print "字符串以单词分割成列表: %s" % L
    L.reverse()#反转列表中单词
    print "反转列表中的单词: %s" % L
    s1 = ' '.join(L)#列表以空格分割单词，返回字符串
    print "以空格分隔列表中反转后的单词: %s" % s1
    return s1
    #return s1.rstrip()#字符串删除首尾空格和回车
L = reverseWords(s)
print "Afer L  :",L

2.测试版本截图：

3.提交AC版本代码：

class Solution:
    # @param s, a string
    # @return a string
    def reverseWords(self, s):
        L = s.split()#字符串以单词分隔成列表
        L.reverse()#反转列表中的单词
        s1 = ' '.join(L)#以空格分隔列表中反转后的单词，返回字符串
        return s1