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+{
+ "metadata": {
+  "name": "Chapter 12"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": "Chapter 12: Advanced types"
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": "Example 12.1, Page number: 212"
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": "# Example 12.1.py\n# To illustrate the use of a 'union'\n\n\n# Union declaration\nfrom ctypes import *\nclass value (Union) :\n   _fields_ = [(\"i_value\", c_int),\n               (\"f_value\", c_float)]\n\n# Calculation and result\ndata = value (3, 5.0)\nprint (data.i_value, data.f_value)",
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": "(1084227584, 5.0)\n"
+      }
+     ],
+     "prompt_number": 1
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file