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ljxpython
test_engineer
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"""
给你一个字符串 s ,请你反转字符串中 单词 的顺序。
单词 是由非空格字符组成的字符串。s 中使用至少一个空格将字符串中的 单词 分隔开。
返回 单词 顺序颠倒且 单词 之间用单个空格连接的结果字符串。
注意:输入字符串 s中可能会存在前导空格、尾随空格或者单词间的多个空格。返回的结果字符串中,单词间应当仅用单个空格分隔,且不包含任何额外的空格。
示例 1:
输入:s = "the sky is blue"
输出:"blue is sky the"
示例 2:
输入:s = " hello world "
输出:"world hello"
解释:反转后的字符串中不能存在前导空格和尾随空格。
示例 3:
输入:s = "a good example"
输出:"example good a"
解释:如果两个单词间有多余的空格,反转后的字符串需要将单词间的空格减少到仅有一个。
提示:
1 <= s.length <= 104
s 包含英文大小写字母、数字和空格 ' '
s 中 至少存在一个 单词
进阶:如果字符串在你使用的编程语言中是一种可变数据类型,请尝试使用 O(1) 额外空间复杂度的 原地 解法。
"""
class Solution(object):
def reverseWords(self, s):
"""
使用内置函数的解法
:type s: str
:rtype: str
"""
# strip()去除首尾空格,split()按空格分割(自动处理多个空格)
# [::-1]反转列表,' '.join()用空格连接
s = s.strip()
list_s = s.split(" ")[::-1]
return ' '.join(list_s)
def other_main(self,s:str):
# 去除空格
s.strip()
# 反转
# 字母反转
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