update

test3.py

@@ -0,0 +1,51 @@
+
+class Vault:
+    def __init__(self):
+        self._treasure = "gold"
+        self._known_good_copy = self.__dict__.copy()
+
+    def __getattribute__(self, name):
+        if name == "treasure":
+            if self.__dict__ != self._known_good_copy:
+                print("Attribute deleted!")
+            return self._treasure
+        else:
+            return object.__getattribute__(self, name)
+
+    def __setattr__(self, name, value):
+        if name != "_treasure" and name != "_known_good_copy":
+            print("Attribute deletion detected!")
+            self._known_good_copy = self.__dict__.copy()
+        object.__setattr__(self, name, value)
+v = Vault()
+Vault.treasure = " haha monkeypatched"
+print(v.treasure)
+
+'''
+class Vault:
+    def __init__(self):
+        self._treasure = "gold"
+        self._known_good_copy = self.__dict__.copy()
+
+    def __get__(self, instance, owner):
+        if instance is None:
+            return self
+        else:
+            if instance.__dict__ != self._known_good_copy:
+                print("Attribute deleted!")
+            return self._treasure
+
+    def __set__(self, instance, value):
+        print("Attribute deletion detected!")
+        self._known_good_copy = instance.__dict__.copy()
+
+    def __delete__(self, instance):
+        print("Attribute deletion detected!")
+        self._known_good_copy = instance.__dict__.copy()
+
+    def __set_name__(self, owner, name):
+        self.name = name
+v = Vault()
+Vault._treasure = " haha monkeypatched"
+print(v._treasure)
+'''