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@@ -0,0 +1,151 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:661266ea5854f8cdb4c1381d519c16a00dd0491ecb04f34e084c46771d5dc464"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 11: Pckages: Putting Classes Together"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 11.1, page no. 198"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\"\"\"\n",
+      "Note there are no packages in Python, a python program(file) can be used as a module in anoter Python program\n",
+      "\"\"\"\n",
+      "\n",
+      "from package1 import *\n",
+      "from package2 import *\n",
+      "\n",
+      "a = classA()\n",
+      "b = classB()\n",
+      "\n",
+      "a.display()\n",
+      "b.displayB()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Class A\n",
+        "Class B\n",
+        "m =  10.0\n"
+       ]
+      }
+     ],
+     "prompt_number": 14
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 11.2, page no. 200"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\"\"\"\n",
+      "Note there are no packages in Python, a python program(file) can be used as a module in anoter Python program\n",
+      "\"\"\"\n",
+      "\n",
+      "from package2 import *\n",
+      "\n",
+      "class classC(classB):\n",
+      "    n = 20\n",
+      "    def displayC(self):\n",
+      "        print \"Class C\"\n",
+      "        print \"m = \", self.m\n",
+      "        print \"n = \", self.n\n",
+      "\n",
+      "c = classC()\n",
+      "c.displayB()\n",
+      "c.displayC()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Class B\n",
+        "m =  10.0\n",
+        "Class C\n",
+        "m =  10.0\n",
+        "n =  20\n"
+       ]
+      }
+     ],
+     "prompt_number": 15
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 11.3, page no. 204"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\"\"\"\n",
+      "there is no concept of static import. We will use normal import instead\n",
+      "\"\"\"\n",
+      "\n",
+      "import math\n",
+      "\n",
+      "class mathop:\n",
+      "    def circle(self, r):\n",
+      "        area = math.pi*r*r\n",
+      "        print \"The Area of circle is: \", area\n",
+      "\n",
+      "obj = mathop()\n",
+      "obj.circle(2.3)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The Area of circle is:  16.6190251375\n"
+       ]
+      }
+     ],
+     "prompt_number": 16
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file