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
        # write code here
        if s=="":
            return ""
        line = s.split(' ')
        new =""
        for i in line:
            k=""
            for j in i:
                if j.isupper():
                    j = j.lower()
                    k = k + j
                    # print(j)
                else:
                    j = j.upper()
                    k = k + j
                    # print(j)
            new = k + " " + new

#         print(new)
#         print(len(new[0:n]))
        return new[0:n]