class search order

not_so_obvious_python_stuff.ipynb

@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:e20426bb66111696c7ec4f8d754946061e129b3e332a6cc2fd00331b9540d8c5"
+  "signature": "sha256:a6418912c66fa2e2c0c8b76a1ba6cb0cb8d33c37c8fd64338d77898af4589286"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -117,6 +117,60 @@
      ],
      "prompt_number": 2
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "So what actually happened above was that class `C` was looking in the parent class `A` for the method `.foo()` first (and found it)!"
+     ]
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "I received an email with a nice suggestion using a more nested example to illustrate Guido van Rossum's point a little bit better:"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "class A(object):\n",
+      "   def foo(self):\n",
+      "      print(\"class A\")\n",
+      "\n",
+      "class B(A):\n",
+      "   pass\n",
+      "\n",
+      "class C(A):\n",
+      "   def foo(self):\n",
+      "      print(\"class C\")\n",
+      "\n",
+      "class D(B,C):\n",
+      "   pass\n",
+      "\n",
+      "D().foo()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "class C\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Here, class `D` searches in `B` first, which in turn inherits from `A` (note that class `C` also inherits from `A`, but has its own `.foo()` method) so that we come up with the search order: `D, B, A, C`"
+     ]
+    },
     {
      "cell_type": "markdown",
      "metadata": {},