Task Give you two strings: s1 and s2. If they are opposite, return true; otherwise, return false. Note: The result should be a boolean value, instead of a string. The opposite means: All letters of the two strings are the same, but the case is opposite. you can assume that the string only contains letters or it's a empty string. Also take note of the edge case - if both strings are empty then you should return false/False. Examples (input -> output) "ab","AB" -> true "aB","Ab" -> true "aBcd","AbCD" -> true "AB","Ab" -> false "","" -> false

def is_opposite(s1, s2):
    if not s1 and not s2:
        return False
    if s1 and s2:
        return s1.swapcase() == s2
    return False