another minor thing

ivanov · ivanov · commit b5ea4f1289af · 2013-11-21T14:15:23.000-08:00
diff --git a/Lectures/11_Cython/misc.ipynb b/Lectures/11_Cython/misc.ipynb
@@ -93,9 +93,56 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "[A blog post about `interned` python builtins](http://me.veekun.com/blog/2012/03/24/python-faq-equality/)"
+      "[A blog post about `interned` python builtins](http://me.veekun.com/blog/2012/03/24/python-faq-equality/), or why:\n",
+      "\n",
+      "* `1000 is 1000` is `True`, \n",
+      "\n",
+      "but\n",
+      " \n",
+      "* `x = 1000; x is 1000` is `False`"
      ]
     },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "1000 is 1000"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "metadata": {},
+       "output_type": "pyout",
+       "prompt_number": 17,
+       "text": [
+        "True"
+       ]
+      }
+     ],
+     "prompt_number": 17
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "x = 1000\n",
+      "x is 1000"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "metadata": {},
+       "output_type": "pyout",
+       "prompt_number": 19,
+       "text": [
+        "False"
+       ]
+      }
+     ],
+     "prompt_number": 19
+    },
     {
      "cell_type": "code",
      "collapsed": false,
