1class HauntedMansion():
 2    """Represent a haunted mansion."""
 3    
 4    _PREFIX = ("spooky_",)
 5    
 6    def __init__(self, **kwargs):
 7        for key, value in kwargs.items():
 8            setattr(self, key, value)
 9            
10    def __getattr__(self, name):
11        return "Booooo, only ghosts here!"
12    
13    def __setattr__(self, name, value):
14        object.__setattr__(self, HauntedMansion._PREFIX[0] + name, value)