题解 | #字符串变形#

#
# 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 s string字符串 
# @param n int整型 
# @return string字符串
#
class Solution:
    def trans(self , s: str, n: int) -> str:
        # write code here
        arrStr = s.split(" ")
        arrStr.reverse()
        returnStr = ""
        for i in range(0,len(arrStr)):
            if i == len(arrStr) - 1:
                returnStr = returnStr + arrStr[i].swapcase()
            else:
                returnStr = returnStr + arrStr[i].swapcase() + " " 
        return returnStr

1.先分割字符串，得到数组(split方法)

2.反转数组(reverse方法)

3.遍历数组，进行字符串拼接，同时转换大小写(swapcase方法)