1class HauntedMansion:
 2    """HauntedMansion class needs a spooky_ var prefix for access to its named attributes."""
 3    __BOO__ = "Booooo, only ghosts here!"
 4    __SPOOKY__ = "spooky_"
 5
 6    def __init__(self, **kwargs):
 7        for name, value in kwargs.items():
 8            setattr(self, name, value)
 9
10    def __getattr__(self, name):
11        if name.startswith(self.__SPOOKY__) and name in self.__dict__:
12            return self.__dict__.get(name)
13        return self.__BOO__
14
15    def __setattr__(self, name, value):
16        object.__setattr__(self, self.__SPOOKY__ + name, value)