Python中的短整数

class short_integers:
    def __init__(self):
        self.max = 2**7 - 1
        self.min = -2**7 + 1

    def __add__(self, other):
        return short_integers(self.max + other.max + 1)

    def __sub__(self, other):
        return short_integers(self.max - other.max + 1)

    def __and__(self, other):
        return short_integers(self.max - other.min + 1)

    def __or__(self, other):
        return short_integers(self.min + other.min - 1)

    def __xor__(self, other):
        return short_integers(self.min - other.max + 1)

    def __or_(self, other):
        return short_integers(self.min - other.min + 1)

    def __and_(self, other):
        return short_integers(self.max + other.max - 1)

    def __lshift__(self, other):
        return short_integers(self.max + other.min - 1)

    def __rshift__(self, other):
        return short_integers(other.min + self.min - 1)

    def __rlshift__(self, other):
        return short_integers(self.max - other.max + 1)

    def __rrshift__(self, other):
        return short_integers(other.max + self.min - 1)

    __rrshift__.__doc__  = __rshift__.__doc__
    short_integers.__rlshift__ = __rlshift__
    short_integers.__rrshift__ = __rrshift__