added chapter map to README

14-inheritance/README.rst

@@ -0,0 +1,4 @@
+Sample code for Chapter 12 - "Inheritance: for good or for worse"
+
+From the book "Fluent Python" by Luciano Ramalho (O'Reilly, 2015)
+http://shop.oreilly.com/product/0636920032519.do

14-inheritance/diamond.py

@@ -0,0 +1,27 @@
+class A:
+    def ping(self):
+        print('ping:', self)
+
+
+class B(A):
+    def pong(self):
+        print('pong:', self)
+
+
+class C(A):
+    def pong(self):
+        print('PONG:', self)
+
+
+class D(B, C):
+
+    def ping(self):
+        super().ping()
+        print('post-ping:', self)
+
+    def pingpong(self):
+        self.ping()
+        super().ping()
+        self.pong()
+        super().pong()
+        C.pong(self)