update from Atlas with major reorg

attic/metaprog/prop_inheritance.py

@@ -0,0 +1,29 @@
+"""
+Alex Martelli, _Python in a Nutshell, 2e._ (O'Reilly, 2006), p. 101
+
+==========================
+Properties and inheritance
+==========================
+
+Properties are inherited normally, just like any other attribute.
+However, there’s a little trap for the unwary: the methods called
+upon to access a property are those that are defined in the class
+in which the property itself is defined, without intrinsic use of
+further overriding that may happen in subclasses. For example:
+"""
+
+class B(object):
+
+    def f(self):
+        return 23
+
+    g = property(f)
+
+class C(B):
+
+    def f(self):
+        return 42
+
+c = C()
+
+print(c.g) # prints 23, not 42