import sys

class SBA:
    slots = ('_arr', '_size', '_memsize')

    def __init__(self, size):
        if not isinstance(size, int):
            raise ValueError("Size should be integer!")
        self._arr = 1<<size
        self._size = size
        self._memsize = f"{round(sys.getsizeof(self._arr) / 1024, 2)} KByte"

    @property
    def memsize(self):
        return self._memsize
    
    def __getitem__(self, sliced):
        if not isinstance(sliced, int):
            raise ValueError("Only integers accepted as position!")
        if sliced >= self._size:
            raise ValueError("Range out of boundaries!")
        if (self._arr & 1<<sliced) > 0:
            return 1
        return 0

    def __setitem__(self, sliced, val):
        if not isinstance(sliced, int):
            raise ValueError("Only integers accepted as position!")
        if not isinstance(val, (int, bool)):
            raise ValueError("Values accepted as int or bool")
        if sliced >= self._size:
            raise ValueError("Range out of boundaries!")

        if isinstance(val, bool):
            v = {True: 1, False: 0}[val]
        else:
            if 0 > val > 1:
                raise ValueError("Value is out of range!")
            v = val
        self._arr = self._arr | v<<sliced

    def __len__(self):
        return self._size

    def to01(self):
        return "".join([str(self.__getitem__(x)) for x in range(self._size-1, -1, -1)])

if __name__ == "__main__":
    s = SBA(16)
    print(s[1])
    s[1] = 1
    print(s[1])
    print(len(s))
    try:
        print(s[16])
    except Exception as e:
        print(e)
    print(s.to01())