题解 | #翻转单词序列#

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param str string字符串 
# @return string字符串
#
class Solution:
    def ReverseSentence(self , str: str) -> str:
        # write code here
        wordlist = str.split(" ")
        left = 0 
        right = len(wordlist)-1
        while left< right:
            tmp = wordlist[left]
            wordlist[left] = wordlist[right]
            wordlist[right] = tmp
            left +=1
            right -=1
        result = " ".join(i for i in wordlist )
        return result