add/remove/update books

1 files changed, 0 insertions, 2137 deletions

diff --git a/Magnifying_C/Chapter_12.ipynb b/Magnifying_C/Chapter_12.ipynb
deleted file mode 100755
index 4fec3405..00000000
--- a/Magnifying_C/Chapter_12.ipynb
+++ /dev/null
@@ -1,2137 +0,0 @@
-{
- "metadata": {
-  "name": ""
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 1,
-     "metadata": {},
-     "source": [
-      "Chapter 12: Files"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.1, Page number: 428"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "fp = open('12.1.dat', 'w')\n",
-      "\n",
-      "for i in range (0, 11) :\n",
-      "\tfp.write('%d, %d \\n' % (i, i*i))\n",
-      "fp.close()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 12
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.2, Page number: 429"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "fp = open('12.2.dat', 'w')\n",
-      "\n",
-      "for i in range (0, 11) :\n",
-      "\tfp.write('%d, %d \\n' % (i, i*i))\n",
-      "fp.close()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 13
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.3, Page number: 430"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "fp = open('12.2.dat', 'a')\n",
-      "i = 11\n",
-      "fp.write('%d, %d \\n' % (i, i*i))\n",
-      "fp.close()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 1
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.4, Page number: 432"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "with open ('12.2.dat') as fp:\n",
-      "\tfor line in fp :\n",
-      "\t\tprint line\n",
-      "fp.close()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "0, 0 \n",
-        "\n",
-        "1, 1 \n",
-        "\n",
-        "2, 4 \n",
-        "\n",
-        "3, 9 \n",
-        "\n",
-        "4, 16 \n",
-        "\n",
-        "5, 25 \n",
-        "\n",
-        "6, 36 \n",
-        "\n",
-        "7, 49 \n",
-        "\n",
-        "8, 64 \n",
-        "\n",
-        "9, 81 \n",
-        "\n",
-        "10, 100 \n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 15
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.5, Page number: 434"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "print ('Data input ')\n",
-      "f1 = open('12.5.dat', 'w')\n",
-      "f1.write('You are learning Files in Python language ')\n",
-      "f1.close()\n",
-      "\n",
-      "print ('Data output ')\n",
-      "with open ('12.5.dat') as f1:\n",
-      "\tfor line in f1 :\n",
-      "\t\tprint line\n",
-      "f1.close()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Data input \n",
-        "Data output \n",
-        "You are learning Files in Python language \n"
-       ]
-      }
-     ],
-     "prompt_number": 16
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.6, Page number: 435"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "print ('Contents of the data file ')\n",
-      "f1 = open('12.6.dat', 'w')\n",
-      "for i in range (0, 10) :\n",
-      "\tnumber = int(raw_input())\n",
-      "\tf1.write('%d\\n' % number)\n",
-      "f1.close()\n",
-      "\n",
-      "f1 = open('12.6.dat', 'r')\n",
-      "f2 = open('12.6o.dat', 'w')\n",
-      "f3 = open('12.6e.dat', 'w')\n",
-      "\n",
-      "num = [0] * 10\n",
-      "with open ('12.6.dat') as f1 :\n",
-      "\tnum = f1.read().splitlines()\n",
-      "\t\n",
-      "for i in range (0, 10) :\n",
-      "\tif (int(num[i]) % 2) != 0 :\n",
-      "\t\tf2.write('%s \\n' % (num[i]))\n",
-      "\telse :\n",
-      "\t\tf3.write('%s \\n' % (num[i]))\n",
-      "\t\n",
-      "f1.close()\n",
-      "f2.close()\n",
-      "f3.close()\n",
-      "\n",
-      "print ('Contents of the odd file ')\n",
-      "with open ('12.6o.dat') as f2:\n",
-      "\tfor line in f2 :\n",
-      "\t\tprint line\n",
-      "\n",
-      "print ('Contents of the even file ')\n",
-      "with open ('12.6e.dat') as f3:\n",
-      "\tfor line in f3 :\n",
-      "\t\tprint line\n",
-      "\n",
-      "f2.close()\n",
-      "f3.close()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Contents of the data file \n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "1\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "2\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "3\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "4\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "5\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "6\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "7\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "8\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "9\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "10\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Contents of the odd file \n",
-        "1 \n",
-        "\n",
-        "3 \n",
-        "\n",
-        "5 \n",
-        "\n",
-        "7 \n",
-        "\n",
-        "9 \n",
-        "\n",
-        "Contents of the even file \n",
-        "2 \n",
-        "\n",
-        "4 \n",
-        "\n",
-        "6 \n",
-        "\n",
-        "8 \n",
-        "\n",
-        "10 \n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 17
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.7, Page number: 438"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "filename = raw_input('Input filename: ')\n",
-      "fp = open(filename, 'w')\n",
-      "\n",
-      "print ('Input inventory data ')\n",
-      "print ('\\nItemName number price quantity ')\n",
-      "\n",
-      "data = [[0 for y in xrange(5)] for x in xrange(3)]\n",
-      "for i in range (0, 3) :\n",
-      "\tfor j in range (0, 4) :\n",
-      "\t\tdata[i][j] = raw_input('')\n",
-      "\t\tfp.write('%s  ' % data[i][j]),\n",
-      "\tfp.write('\\n')\n",
-      "\tprint\n",
-      "fp.close()\n",
-      "\n",
-      "fp = open(filename, 'r')\n",
-      "\n",
-      "for i in range (0, 3) :\n",
-      "\tfor j in range (2, 3) :\n",
-      "\t\tdata[i][j+2] = float(data[i][j]) * int(data[i][j+1])\n",
-      "\n",
-      "print ('ItemName   number   price   quantity   value ')\n",
-      "for i in range (0, 3) :\n",
-      "\tfor j in range (0, 5) :\n",
-      "\t\tprint ('%8s' % data[i][j]),\n",
-      "\tprint"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Input filename: 12.7.dat\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Input inventory data \n",
-        "\n",
-        "ItemName number price quantity \n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Monitor\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "11\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "3005.50\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "10\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Mouse\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "22\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "500.50\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "5\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Keyboard\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "33\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "750.00\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "10\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "ItemName   number   price   quantity   value \n",
-        " Monitor       11  3005.50       10  30055.0\n",
-        "   Mouse       22   500.50        5   2502.5\n",
-        "Keyboard       33   750.00       10   7500.0\n"
-       ]
-      }
-     ],
-     "prompt_number": 18
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.8, Page number: 440"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "with open ('12.5.dat') as fp:\n",
-      "\tfor line in fp :\n",
-      "\t\tprint line\n",
-      "fp.close()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "You are learning Files in Python language \n"
-       ]
-      }
-     ],
-     "prompt_number": 19
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.9, Page number: 441"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "from sys import argv\n",
-      "\n",
-      "# Calculation and result\n",
-      "script, filename = argv\n",
-      "file = open(filename)\n",
-      "print file.read()\n",
-      "print ('\\nFile displayed successfully.....')"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": []
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "%run 12.9.py 12.1.dat"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "0, 0 \n",
-        "1, 1 \n",
-        "2, 4 \n",
-        "3, 9 \n",
-        "4, 16 \n",
-        "5, 25 \n",
-        "6, 36 \n",
-        "7, 49 \n",
-        "8, 64 \n",
-        "9, 81 \n",
-        "10, 100 \n",
-        "\n",
-        "\n",
-        "File displayed successfully.....\n"
-       ]
-      }
-     ],
-     "prompt_number": 20
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.10, Page number: 444"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "class person (object) :\n",
-      "\tdef __init__(self, name = None, age = 0):\n",
-      "\t\tself.name = 0\n",
-      "\t\tself.age = 0\n",
-      "\t\t\n",
-      "data = [person() for i in range (5)]\n",
-      "\n",
-      "fp = open('12.10.dat','w')\n",
-      "\n",
-      "for i in range (0, 5) :\n",
-      "\tdata[i].name = raw_input('\\nEnter name : ')\n",
-      "\tdata[i].age = int(raw_input('Enter age : '))\n",
-      "\t\n",
-      "for i in range (0, 5) :\n",
-      "\tfp.write('%s %d \\n' % (data[i].name, data[i].age))\n",
-      "\n",
-      "print ('\\n...Records are written to a file...')\n",
-      "print ('...Displaying records from a file...')\n",
-      "\n",
-      "for i in range (0, 5) :\n",
-      "\tprint ('\\nName : %s ' % data[i].name)\n",
-      "\tprint ('Age : %d ' % data[i].age)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter name : Dhiraj Kumar\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter age : 23\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter name : Mohasin Khan\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter age : 45\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter name : Suresh Waghmare\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter age : 55\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter name : Anand Rao\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter age : 34\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter name : Sunil Deshpande\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter age : 23\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "...Records are written to a file...\n",
-        "...Displaying records from a file...\n",
-        "\n",
-        "Name : Dhiraj Kumar \n",
-        "Age : 23 \n",
-        "\n",
-        "Name : Mohasin Khan \n",
-        "Age : 45 \n",
-        "\n",
-        "Name : Suresh Waghmare \n",
-        "Age : 55 \n",
-        "\n",
-        "Name : Anand Rao \n",
-        "Age : 34 \n",
-        "\n",
-        "Name : Sunil Deshpande \n",
-        "Age : 23 \n"
-       ]
-      }
-     ],
-     "prompt_number": 21
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.11, Page number: 445"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "class record (object) :\n",
-      "\tdef __init__(self, name = None, age = 0) :\n",
-      "\t\tself.name = 0\n",
-      "\t\tself.age = 0\n",
-      "\t\t\n",
-      "def record_write (data, filename) :\n",
-      "\tfilep = open(filename, 'ab')\n",
-      "\tdata.name = raw_input('Enter name : ')\n",
-      "\tdata.age = int(raw_input('Enter age : '))\n",
-      "\tfilep.write('%s %d\\n' % (data.name, data.age))\n",
-      "\t\n",
-      "def record_readall (filename) :\n",
-      "\tprint\n",
-      "\twith open (filename) as filep :\n",
-      "\t\tfor line in filep :\n",
-      "\t\t\tprint line\n",
-      "\n",
-      "data = record ()\n",
-      "filename = '12.11.dat'\n",
-      "\n",
-      "condition = True\n",
-      "while condition :\n",
-      "\tenter = raw_input('\\nAdd record (y/n) ? ')\n",
-      "\tif enter == 'y' or enter == 'Y' :\n",
-      "\t\trecord_write (data, filename)\n",
-      "\telse :\n",
-      "\t\tcondition = False\n",
-      "\t\tbreak\n",
-      "\n",
-      "record_readall (filename)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Add record (y/n) ? y\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter name : Mohan Pande\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter age : 34\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Add record (y/n) ? y\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter name : Nitin Dighe\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter age : 32\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Add record (y/n) ? n\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Mohan Pande 34\n",
-        "\n",
-        "Nitin Dighe 32\n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 11
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.12, Page number: 449"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "fp = open('12.12.txt','r')\n",
-      "fp.seek(0, 0)\n",
-      "line = fp.readline()\n",
-      "print ('Read Line: %s ' % line)\n",
-      "\n",
-      "fp.seek(17, 0)\n",
-      "line = fp.readline()\n",
-      "print ('Read Line: %s ' % line)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Read Line: This is 1st line\n",
-        " \n",
-        "Read Line: This is 2nd line\n",
-        " \n"
-       ]
-      }
-     ],
-     "prompt_number": 22
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.13, Page number: 449"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import os\n",
-      "\n",
-      "# Calculation and result\n",
-      "statinfo = os.stat('12.13.txt')\n",
-      "print ('Filesize of \"12.13.txt\" is %d bytes ' % statinfo.st_size)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Filesize of \"12.13.txt\" is 15 bytes \n"
-       ]
-      }
-     ],
-     "prompt_number": 23
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.14, Page number: 455"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "nc = nlines = 0\n",
-      "\n",
-      "filename = raw_input('Enter file name: ')\n",
-      "with open(filename, 'r') as fp :\n",
-      "    for line in fp :\n",
-      "        nlines += 1\n",
-      "        nc += len(line)\n",
-      "fp.close()\n",
-      "\n",
-      "print ('There are %d characters in %s ' % (nc, filename))\n",
-      "print ('There are %d lines ' % nlines)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter file name: 12.14.txt\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "There are 55 characters in 12.14.txt \n",
-        "There are 1 lines \n"
-       ]
-      }
-     ],
-     "prompt_number": 9
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.15, Page number: 456"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "linecount = 0\n",
-      "filename = raw_input('Enter file name: ')\n",
-      "fp = open(filename, 'r')\n",
-      "for line in fp :\n",
-      "\tprint line\n",
-      "\tlinecount += 1\n",
-      "\tif linecount % 20 == 0 :\n",
-      "\t\traw_input(\"[Press Return to continue, Q to quit]\")\n",
-      "\t\tif raw_input() == 'Q' :\n",
-      "\t\t\texit()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter file name: 12.15.txt\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "1\n",
-        "\n",
-        "2\n",
-        "\n",
-        "3\n",
-        "\n",
-        "4\n",
-        "\n",
-        "5\n",
-        "\n",
-        "6\n",
-        "\n",
-        "7\n",
-        "\n",
-        "8\n",
-        "\n",
-        "9\n",
-        "\n",
-        "10\n",
-        "\n",
-        "11\n",
-        "\n",
-        "12\n",
-        "\n",
-        "13\n",
-        "\n",
-        "14\n",
-        "\n",
-        "15\n",
-        "\n",
-        "16\n",
-        "\n",
-        "17\n",
-        "\n",
-        "18\n",
-        "\n",
-        "19\n",
-        "\n",
-        "20\n",
-        "\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "[Press Return to continue, Q to quit]Q\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "21\n",
-        "\n",
-        "22\n",
-        "\n",
-        "23\n",
-        "\n",
-        "24\n",
-        "\n",
-        "25\n",
-        "\n",
-        "26\n",
-        "\n",
-        "27\n",
-        "\n",
-        "28\n",
-        "\n",
-        "29\n",
-        "\n",
-        "30\n",
-        "\n",
-        "31\n",
-        "\n",
-        "32\n",
-        "\n",
-        "33\n",
-        "\n",
-        "34\n",
-        "\n",
-        "35\n",
-        "\n",
-        "36\n",
-        "\n",
-        "37\n",
-        "\n",
-        "38\n",
-        "\n",
-        "39\n",
-        "\n",
-        "40\n",
-        "\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "[Press Return to continue, Q to quit]\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "41\n",
-        "\n",
-        "42\n",
-        "\n",
-        "43\n",
-        "\n",
-        "44\n",
-        "\n",
-        "45\n",
-        "\n",
-        "46\n",
-        "\n",
-        "47\n",
-        "\n",
-        "48\n",
-        "\n",
-        "49\n",
-        "\n",
-        "50\n",
-        "\n",
-        "51\n",
-        "\n",
-        "52\n",
-        "\n",
-        "53\n",
-        "\n",
-        "54\n",
-        "\n",
-        "55\n",
-        "\n",
-        "56\n",
-        "\n",
-        "57\n",
-        "\n",
-        "58\n",
-        "\n",
-        "59\n",
-        "\n",
-        "60\n",
-        "\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "[Press Return to continue, Q to quit]\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "61\n",
-        "\n",
-        "62\n",
-        "\n",
-        "63\n",
-        "\n",
-        "64\n",
-        "\n",
-        "65\n",
-        "\n",
-        "66\n",
-        "\n",
-        "67\n",
-        "\n",
-        "68\n",
-        "\n",
-        "69\n",
-        "\n",
-        "70\n",
-        "\n",
-        "71\n",
-        "\n",
-        "72\n",
-        "\n",
-        "73\n",
-        "\n",
-        "74\n",
-        "\n",
-        "75\n",
-        "\n",
-        "76\n",
-        "\n",
-        "77\n",
-        "\n",
-        "78\n",
-        "\n",
-        "79\n",
-        "\n",
-        "80\n",
-        "\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "[Press Return to continue, Q to quit]\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "81\n",
-        "\n",
-        "82\n",
-        "\n",
-        "83\n",
-        "\n",
-        "84\n",
-        "\n",
-        "85\n",
-        "\n",
-        "86\n",
-        "\n",
-        "87\n",
-        "\n",
-        "88\n",
-        "\n",
-        "89\n",
-        "\n",
-        "90\n",
-        "\n",
-        "91\n",
-        "\n",
-        "92\n",
-        "\n",
-        "93\n",
-        "\n",
-        "94\n",
-        "\n",
-        "95\n",
-        "\n",
-        "96\n",
-        "\n",
-        "97\n",
-        "\n",
-        "98\n",
-        "\n",
-        "99\n",
-        "\n",
-        "100\n",
-        "\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "[Press Return to continue, Q to quit]\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 1
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.16, Page number: 457"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "fname1 = raw_input('Enter source file: ')\n",
-      "fname2 = raw_input('Enter destination file: ')\n",
-      "\n",
-      "with open(fname1) as fp1 :\n",
-      "\twith open(fname2,'w') as fp2 : \n",
-      "\t\tfor line in fp1 :\n",
-      "\t\t\tfp2.write(line)\n",
-      "\n",
-      "print ('Files successfully copied ')"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter source file: 12.16in.txt\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter destination file: 12.16out.txt\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Files successfully copied \n"
-       ]
-      }
-     ],
-     "prompt_number": 3
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.17, Page number: 458"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Calculation and result\n",
-      "total = count = 0\n",
-      "filenameIn = raw_input('Please enter an input filename: ')\n",
-      "filenameOut = raw_input('Please enter an output filename: ')\n",
-      "\n",
-      "print ('Opening %s for reading is OK.' % filenameIn)\n",
-      "print ('Opening %s for writing is OK.' % filenameOut)\n",
-      "print ('Calculate the total...')\n",
-      "\n",
-      "for i in open(filenameIn) :\n",
-      "\tcount += 1\n",
-      "\ttotal += int(i.strip())\n",
-      "\t\n",
-      "print ('Calculate the average...')\n",
-      "fileptrOut = open(filenameOut,'w')\n",
-      "fileptrOut.write('Average of %d numbers = %f ' % (count, (total/count)))\n",
-      "\n",
-      "print ('Check also your %s file content ' % filenameOut)\n",
-      "fileptrOut.close()\n",
-      "print ('\"%s\" closed successfully ' % filenameIn)\n",
-      "print ('\"%s\" closed successfully ' % filenameOut)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Please enter an input filename: 12.17in.dat\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Please enter an output filename: 12.17out.dat\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Opening 12.17in.dat for reading is OK.\n",
-        "Opening 12.17out.dat for writing is OK.\n",
-        "Calculate the total...\n",
-        "Calculate the average...\n",
-        "Check also your 12.17out.dat file content \n",
-        "\"12.17in.dat\" closed successfully \n",
-        "\"12.17out.dat\" closed successfully \n"
-       ]
-      }
-     ],
-     "prompt_number": 1
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.18, Page number: 460"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Structure declaration\n",
-      "class STUDENT (object) :\n",
-      "\tdef __init__(self, fname=None, lname=None, id=None, quiz1=None, quiz2=None, quiz3=None, quiz4=None, exam=None) :\n",
-      "\t\tself.fname = fname\n",
-      "\t\tself.lname = lname\n",
-      "\t\tself.id = id\n",
-      "\t\tself.quiz1 = quiz1\n",
-      "\t\tself.quiz2 = quiz2\n",
-      "\t\tself.quiz3 = quiz3\n",
-      "\t\tself.quiz4 = quiz4\n",
-      "\t\tself.exam = exam\n",
-      "\t\n",
-      "def findLow (students, x, c) :\n",
-      "\tif x == 0 :\n",
-      "\t\tsmall = students[0].quiz1\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif small >= students[i].quiz1 and students[i].quiz1 > 0 :\n",
-      "\t\t\t\tsmall = students[i].quiz1\n",
-      "\t\treturn small\n",
-      "\t\t\n",
-      "\telif x == 1 :\n",
-      "\t\tsmall = students[0].quiz2\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif small >= students[i].quiz2 and students[i].quiz2 > 0 :\n",
-      "\t\t\t\tsmall = students[i].quiz2\n",
-      "\t\treturn small\n",
-      "\t\t\n",
-      "\telif x == 2 :\n",
-      "\t\tsmall = students[0].quiz3\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif small >= students[i].quiz3 and students[i].quiz3 > 0 :\n",
-      "\t\t\t\tsmall = students[i].quiz3\n",
-      "\t\treturn small\n",
-      "\n",
-      "\telif x == 3 :\n",
-      "\t\tsmall = students[0].quiz4\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif small >= students[i].quiz4 and students[i].quiz4 > 0 :\n",
-      "\t\t\t\tsmall = students[i].quiz4\n",
-      "\t\treturn small\n",
-      "\t\t\n",
-      "\telif x == 4 :\n",
-      "\t\tsmall = students[0].exam\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif small >= students[i].exam and students[i].exam > 0 :\n",
-      "\t\t\t\tsmall = students[i].exam\n",
-      "\t\treturn small\n",
-      "\treturn 0\n",
-      "\n",
-      "def findHigh (students, x, c) :\n",
-      "\tif x == 0 :\n",
-      "\t\tbig = students[0].quiz1\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif big <= students[i].quiz1 :\n",
-      "\t\t\t\tbig = students[i].quiz1\n",
-      "\t\treturn big\n",
-      "\t\t\n",
-      "\telif x == 1 :\n",
-      "\t\tbig = students[0].quiz2\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif big <= students[i].quiz2 :\n",
-      "\t\t\t\tbig = students[i].quiz2\n",
-      "\t\treturn big\n",
-      "\t\t\n",
-      "\telif x == 2 :\n",
-      "\t\tbig = students[0].quiz3\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif big <= students[i].quiz3 :\n",
-      "\t\t\t\tbig = students[i].quiz3\n",
-      "\t\treturn big\n",
-      "\n",
-      "\telif x == 3 :\n",
-      "\t\tbig = students[0].quiz4\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif big <= students[i].quiz4 :\n",
-      "\t\t\t\tbig = students[i].quiz4\n",
-      "\t\treturn big\n",
-      "\t\t\n",
-      "\telif x == 4 :\n",
-      "\t\tbig = students[0].exam\n",
-      "\t\tfor i in range (1, c) :\n",
-      "\t\t\tif big <= students[i].exam :\n",
-      "\t\t\t\tbig = students[i].exam\n",
-      "\t\treturn big\n",
-      "\treturn 0\n",
-      "\n",
-      "\n",
-      "students = [STUDENT() for i in range (5)]\n",
-      "summ = avg = low = high = [0] * 5\n",
-      "cnt = 0\n",
-      "\n",
-      "print ('--- CLASS INFO --- \\n')\n",
-      "print ('Name\\t\\t Id\\tQuiz1   Quiz2   Quiz3   Quiz4   Exam \\n')\n",
-      "\n",
-      "with open('12.18.txt') as fpr :\n",
-      "\tfor line in fpr :\n",
-      "\t\ti = 0\n",
-      "\t\tstudents[i].fname, students[i].lname, students[i].id, students[i].quiz1, students[i].quiz2, students[i].quiz3, students[i].quiz4, students[i].exam = line.split()\n",
-      "\t\tstudents[i].id = int(students[i].id)\n",
-      "\t\tstudents[i].quiz1 = int(students[i].quiz1)\n",
-      "\t\tstudents[i].quiz2 = int(students[i].quiz2)\n",
-      "\t\tstudents[i].quiz3 = int(students[i].quiz3)\n",
-      "\t\tstudents[i].quiz4 = int(students[i].quiz4)\n",
-      "\t\tstudents[i].exam = int(students[i].exam)\n",
-      "\t\t\n",
-      "\t\tprint ('%-s %-s\\t %-4d\t%-3d\t%-3d\t%-3d\t%-3d\t%-3d' % (students[i].fname, students[i].lname, students[i].id, students[i].quiz1, students[i].quiz2, students[i].quiz3, students[i].quiz4, students[i].exam)) \n",
-      "\t\t\n",
-      "\t\tsumm[0] += int(students[i].quiz1)\n",
-      "\t\tsumm[1] += int(students[i].quiz2)\n",
-      "\t\tsumm[2] += int(students[i].quiz3)\t\t\n",
-      "\t\tsumm[3] += int(students[i].quiz4)\n",
-      "\t\tsumm[4] += int(students[i].exam)\n",
-      "\t\ti = i+1\n",
-      "\t\tcnt = cnt+1\n",
-      "\n",
-      "print ('\\nSTATISTICS')\n",
-      "print ('\\t\\tQuiz1\tQuiz2\tQuiz3\tQuiz4\tExam\\n')\n",
-      "print ('Average:\\t'),\n",
-      "for i in range (0, 5) :\n",
-      "\tavg[i] = float(summ[i])/cnt\n",
-      "\tprint ('%-5.1f \\t' % avg[i]),\n",
-      "print\n",
-      "\n",
-      "print ('Lowest:\\t\\t'),\n",
-      "for i in range (0, 5) :\n",
-      "\tlow[i] = findLow (students, i, cnt)\n",
-      "\thigh[i] = findHigh (students, i, cnt)\n",
-      "\t\n",
-      "for i in range (0, 5) :\n",
-      "\tprint ('%-5d \\t' % low[i]),\n",
-      "print\n",
-      "\t\n",
-      "print ('Highest:\\t'),\n",
-      "for i in range (0, 5) :\n",
-      "\tprint ('%-5d \\t' % high[i]),\n",
-      "print\n",
-      "\n",
-      "print ('\\n --- END OF REPORT --- \\n')"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "--- CLASS INFO --- \n",
-        "\n",
-        "Name\t\t Id\tQuiz1   Quiz2   Quiz3   Quiz4   Exam \n",
-        "\n",
-        "anand mane\t 11  \t10 \t3  \t4  \t5  \t80 \n",
-        "mandar patil\t 12  \t4  \t5  \t6  \t7  \t50 \n",
-        "kishoe dhane\t 13  \t4  \t5  \t6  \t8  \t55 \n",
-        "\n",
-        "STATISTICS\n",
-        "\t\tQuiz1\tQuiz2\tQuiz3\tQuiz4\tExam\n",
-        "\n",
-        "Average:\t6.0   \t4.3   \t5.3   \t6.7   \t61.7  \t\n",
-        "Lowest:\t\t4     \t5     \t6     \t8     \t55    \t\n",
-        "Highest:\t4     \t5     \t6     \t8     \t55    \t\n",
-        "\n",
-        " --- END OF REPORT --- \n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 10
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 12.19, Page number: 466"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import sys\n",
-      "\n",
-      "# Structure declaration\n",
-      "class Employee (object) :\n",
-      "\tdef __init__(self, fname=None, lname=None, sub_taken=None, last_edu=None, join_date=None, id=None, age=None, bsal=None) :\n",
-      "\t\tself.fname = fname\n",
-      "\t\tself.lname = lname\n",
-      "\t\tself.sub_taken = sub_taken\n",
-      "\t\tself.last_edu = last_edu\n",
-      "\t\tself.join_date = join_date\n",
-      "\t\tself.id = id\n",
-      "\t\tself.age = age\n",
-      "\t\tself.bsal = bsal\n",
-      "\t\n",
-      "emp = Employee ()\n",
-      "fp = open('12.19.dat','ab+')\n",
-      "recsize = sys.getsizeof(emp)\n",
-      "\n",
-      "condition = True\n",
-      "while condition :\n",
-      "\tprint ('\\n1.Add Records \\\n",
-      "\t\t\t  \\n2.Delete Records \\\n",
-      "\t\t\t  \\n3.Modify Records \\\n",
-      "\t\t\t  \\n4.List Records \\\n",
-      "\t\t\t  \\n5.Exit')\n",
-      "\tchoice = int(raw_input('\\nEnter your choice: '))\n",
-      "\t\n",
-      "\tif choice == 1 :\n",
-      "\t\tanother = 'Y'\n",
-      "\t\twhile another == 'Y' or another == 'y' :\n",
-      "\t\t\tfp = open('12.19.dat','ab+')\n",
-      "\t\t\temp.fname = raw_input('Enter the first name: ')\n",
-      "\t\t\temp.lname = raw_input('Enter the last name: ')\n",
-      "\t\t\temp.age = int(raw_input('Enter the age: '))\n",
-      "\t\t\temp.bsal = int(raw_input('Enter the basic salary: '))\n",
-      "\t\t\temp.join_date = int(raw_input('Enter joining date: '))\n",
-      "\t\t\temp.id = int(raw_input('Enter the employee id: '))\n",
-      "\t\t\temp.last_edu = raw_input('Enter the last education: ')\n",
-      "\t\t\temp.sub_taken = raw_input('Enter the subject taken: ')\n",
-      "\t\t\tfp.write('%d %s %s %d %d %s %s %s \\n' % (emp.id, emp.fname, emp.lname, emp.age, emp.bsal, emp.join_date, emp.last_edu, emp.sub_taken))\n",
-      "\t\t\tanother = raw_input('Add another record (Y/N) ? ')\n",
-      "\n",
-      "\telif choice == 2 :\n",
-      "\t\tanother = 'Y'\n",
-      "\t\twhile another == 'Y' or another == 'y' :\n",
-      "\t\t\tfp = open('12.19.dat','r')\n",
-      "\t\t\tlines = fp.readlines()\n",
-      "\t\t\tlines = lines[:-1]\n",
-      "\t\t\tprint ('\\nRecord deleted ')\n",
-      "\t\t\tanother = raw_input('Delete another record (Y/N) ? ')\n",
-      "\t\t\n",
-      "\telif choice == 3 :\n",
-      "\t\tfp = open('12.19.dat','w')\n",
-      "\t\tanother = 'Y'\n",
-      "\t\twhile another == 'Y' or another == 'y' :\n",
-      "\t\t\temp.fname = raw_input('Enter the first name: ')\n",
-      "\t\t\temp.lname = raw_input('Enter the last name: ')\n",
-      "\t\t\temp.age = int(raw_input('Enter the age: '))\n",
-      "\t\t\temp.bsal = int(raw_input('Enter the basic salary: '))\n",
-      "\t\t\temp.join_date = int(raw_input('Enter joining date: '))\n",
-      "\t\t\temp.id = int(raw_input('Enter the employee id: '))\n",
-      "\t\t\temp.last_edu = raw_input('Enter the last education: ')\n",
-      "\t\t\temp.sub_taken = raw_input('Enter the subject taken: ')\n",
-      "\t\t\tfp.write('%d %s %s %d %d %s %s %s \\n' % (emp.id, emp.fname, emp.lname, emp.age, emp.bsal, emp.join_date, emp.last_edu, emp.sub_taken))\n",
-      "\t\t\tanother = raw_input('Modify another record (Y/N) ? ')\n",
-      "\t \t\n",
-      "\telif choice == 4 :\n",
-      "\t\twith open ('12.19.dat','r') as fp :\n",
-      "\t\t\tfor line in fp :\n",
-      "\t\t\t\tprint line\n",
-      "\t\t\n",
-      "\telif choice == 5 :\n",
-      "\t\tcondition = False\n",
-      "\t\tfp.close()\n",
-      "\t\texit()"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "1.Add Records \t\t\t  \n",
-        "2.Delete Records \t\t\t  \n",
-        "3.Modify Records \t\t\t  \n",
-        "4.List Records \t\t\t  \n",
-        "5.Exit\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter your choice: 1\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the first name: Anand\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the last name: Rao\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the age: 29\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the basic salary: 5000\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter joining date: 2004\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the employee id: 11\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the last education: BCA\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the subject taken: OS\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Add another record (Y/N) ? y\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the first name: Deepti\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the last name: Garg\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the age: 22\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the basic salary: 25000\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter joining date: 2014\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the employee id: 12\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the last education: BTech\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the subject taken: CSE\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Add another record (Y/N) ? n\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "1.Add Records \t\t\t  \n",
-        "2.Delete Records \t\t\t  \n",
-        "3.Modify Records \t\t\t  \n",
-        "4.List Records \t\t\t  \n",
-        "5.Exit\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter your choice: 4\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "11 Anand Rao 29 5000 2004 BCA OS \n",
-        "\n",
-        "12 Deepti Garg 22 25000 2014 BTech CSE \n",
-        "\n",
-        "\n",
-        "1.Add Records \t\t\t  \n",
-        "2.Delete Records \t\t\t  \n",
-        "3.Modify Records \t\t\t  \n",
-        "4.List Records \t\t\t  \n",
-        "5.Exit\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter your choice: 2\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Record deleted \n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Delete another record (Y/N) ? y\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Record deleted \n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Delete another record (Y/N) ? n\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "1.Add Records \t\t\t  \n",
-        "2.Delete Records \t\t\t  \n",
-        "3.Modify Records \t\t\t  \n",
-        "4.List Records \t\t\t  \n",
-        "5.Exit\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter your choice: 3\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the first name: Nalin\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the last name: Chhibber\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the age: 25\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the basic salary: 30000\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter joining date: 2012\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the employee id: 07\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the last education: MTech\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Enter the subject taken: DBMS\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Modify another record (Y/N) ? n\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "1.Add Records \t\t\t  \n",
-        "2.Delete Records \t\t\t  \n",
-        "3.Modify Records \t\t\t  \n",
-        "4.List Records \t\t\t  \n",
-        "5.Exit\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter your choice: 4\n"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "7 Nalin Chhibber 25 30000 2012 MTech DBMS \n",
-        "\n",
-        "\n",
-        "1.Add Records \t\t\t  \n",
-        "2.Delete Records \t\t\t  \n",
-        "3.Modify Records \t\t\t  \n",
-        "4.List Records \t\t\t  \n",
-        "5.Exit\n"
-       ]
-      },
-      {
-       "name": "stdout",
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n",
-        "Enter your choice: 5\n"
-       ]
-      }
-     ],
-     "prompt_number": 6
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
\ No newline at end of file