def __and__(self, other):
if other is None:
other = NIL_BITMAP
return bitmap(BitMap.__and__(self, other))
def __and__(self, other: Optional[bitmap]) -> bitmap:
if other is None:
other = NIL_BITMAP
if isinstance(other, bitmap):
return bitmap(BitMap.__and__(self.bm, other.bm))
raise TypeError("Invalid type {type(other)}")