Update page 'Day 5 Homework - Karen'

Day 5 Homework - Karen.md

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+```
+class Vault:
+    def __init__(self):
+        self._treasure = "gold"
+        self._attributes = dict(self.__dict__)
+        
+    def __setattr__(self, name, value):
+        if name != "_attributes" and name not in self._attributes:
+            print("attribute deleted!")
+        self._attributes[name] = value
+        super().__setattr__("_attributes", dict(self.__dict__))
+        
+    @property
+    def treasure(self):
+        if self.__dict__ != self._attributes:
+            print("attribute deleted!")
+        return self._treasure
+```
+To assess other's Vault (although it may not be ethical), we can use "__getattribute__" method like:
+
+```
+class EvilVault(Vault):
+    def __getattribute__(self, name):
+        if name == "treasure":
+            return "gold"
+        return super().__getattribute__(name)
+```