1SPOOKY_PREFIX = 'spooky_'
 2
 3class HauntedMansion:
 4    """Make everything spooky."""
 5
 6    def __init__(self, **kwargs):
 7        for key, value in kwargs.items():
 8            self.__setattr__(key,value)
 9
10    def __setattr__(self, key, value):
11        spooky_key = SPOOKY_PREFIX + key
12        object.__setattr__(self, spooky_key, value)
13
14    def __getattr__(self, item):
15        return 'Booooo, only ghosts here!'