1class HauntedMansion:
 2    HELPER = ("_data", "spooky_")
 3
 4    def __init__(self, **kwargs):
 5        self._data = {}  # "protected"
 6        for key, value in kwargs.items():
 7            self._data[key] = value
 8
 9    def __getattr__(self, name):
10        if self._pref_validator(name):
11            original_name = name[len(self.HELPER[1]):]
12            if original_name in self._data:
13                return self._data[original_name]
14        return "Booooo, only ghosts here!"
15
16    def __setattr__(self, name, value):
17        if name == self.HELPER[0]:  # protect the actual data of the class
18            object.__setattr__(self, name, value)  # prevents an endless cycle
19        else:
20            self._data[name] = value
21
22    def _pref_validator(self, name):
23        if len(name) < len(self.HELPER[1]):
24            return False
25        for i in range(len(self.HELPER[1])):
26            if name[i] != self.HELPER[1][i]:
27                return False
28        return True