151.翻转字符串里的单词

class Solution:
    def reverseWords(self, s: str) -> str:
        if s == ‘‘:
            return s

        ls = s.split()

        # "   "
        if ls == []:
            return ‘‘

        result = ‘‘
        for i in range(0, len(ls)):
            result += ls[-1 - i] + ‘ ‘
        # strip()去除首尾空格
        result = result.strip()
        return result

原文地址：https://www.cnblogs.com/WJZheng/p/11402617.html