大小写转换python标准题解

解题思路:

注意事项:

参考代码:

def transform(astring):
    result=''
    for char in astring:
        if char.isupper():
            char=char.lower()
            result+=char
        else:
            char=char.upper()
            result += char
    return result
string=input()
result=transform(string)
print(result)