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diff --git a/Computer_Concepts_and_C_Programming_by_R.Rajaram/chapter15_8.ipynb b/Computer_Concepts_and_C_Programming_by_R.Rajaram/chapter15_8.ipynb
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+++ b/Computer_Concepts_and_C_Programming_by_R.Rajaram/chapter15_8.ipynb
@@ -0,0 +1,384 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:1653abf733b2f9f179249fa6301d56a0dc1802cab84a3f5e0ff6ee96488fe3f6"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "15:FILES"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "15.4.1, Page number:224"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "while True:\n",
+      "    print \"Enter Text\"\n",
+      "    c = raw_input()\n",
+      "    print 'Text entered is:'\n",
+      "    print c\n",
+      "    if c[-1] == '.':\n",
+      "        break"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Enter Text\n"
+       ]
+      },
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "C programming language is modern and advanced;\n"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Text entered is:\n",
+        "C programming language is modern and advanced;\n",
+        "Enter Text\n"
+       ]
+      },
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "it enables addressing bits and bytes.\n"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Text entered is:\n",
+        "it enables addressing bits and bytes.\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "15.9.1, Page number:224"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "def EOF():\n",
+      "    return -1\n",
+      "while True:\n",
+      "    print \"Enter Text\"\n",
+      "    c = raw_input()\n",
+      "    print 'Text entered is:'\n",
+      "    print c\n",
+      "    if c != EOF():\n",
+      "        break"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Enter Text\n"
+       ]
+      },
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "madurai is a great city ,meenakshi temple is in the heart,millions of pilgrims visit the temple every year.\n"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Text entered is:\n",
+        "madurai is a great city ,meenakshi temple is in the heart,millions of pilgrims visit the temple every year.\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "15.10.1,page numebr:231"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "print \"Key in Text:\"\n",
+      "f = open('myfile','w')\n",
+      "c=str(raw_input())\n",
+      "f.write(c)\n",
+      "print \"The text is:\"\n",
+      "f = open('myfile','r')\n",
+      "print f.read()\n",
+      "f.close()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Key in Text:\n"
+       ]
+      },
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Madurai city is famous for its historical mounaments and archives,every visitor must see these places.\n"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The text is:\n",
+        "Madurai city is famous for its historical mounaments and archives,every visitor must see these places.\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "15.12.1,page numebr:233"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "def file_output(x):\n",
+      "    f=open(x,\"r\")\n",
+      "    print f.read()\n",
+      "original = open('stud_rec','w')\n",
+      "copy = open('image','a')\n",
+      "\n",
+      "original.write(\"Tirupparankundram\\n\")\n",
+      "copy.write(\"Tirupparankundram\\n\")\n",
+      "\n",
+      "original.close()\n",
+      "copy.close()\n",
+      "\n",
+      "print \"After adding input,stud_rec has: \"\n",
+      "file_output(\"stud_rec\")\n",
+      "print \"After append,image contains:\"\n",
+      "file_output(\"image\")\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "After adding input,stud_rec has: \n",
+        "Tirupparankundram\n",
+        "\n",
+        "After append,image contains:\n",
+        "Tirupparankundram\n",
+        "Tirupparankundram\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "15.14.1,page number:237"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "print \"Type in the Text:\"\n",
+      "f = open('madurai','w')\n",
+      "c=str(raw_input())\n",
+      "f.write(c)\n",
+      "print \"The text read as:\"\n",
+      "f = open('madurai','r')\n",
+      "print f.read()\n",
+      "f.close()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Type in the Text:\n"
+       ]
+      },
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Madurai is an ancient city,ruled by pandyas,Tirumalai nayakar was the last prominent ruler who left many monuments; but meenakshi temple has no age\n"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The text read as:\n",
+        "Madurai is an ancient city,ruled by pandyas,Tirumalai nayakar was the last prominent ruler who left many monuments; but meenakshi temple has no age\n"
+       ]
+      }
+     ],
+     "prompt_number": 6
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "15.16.1,page number:239"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import os\n",
+      "import sys\n",
+      "import fileinput\n",
+      "import string\n",
+      "\n",
+      "print \"Madurai Contains :\"\n",
+      "f = open('madurai_1','r')\n",
+      "print f.read()\n",
+      "f.close()\n",
+      "\n",
+      "s = open(\"madurai_1\").read()\n",
+      "s = s.replace('temple', 'shrine')\n",
+      "f = open(\"madurai_1\", 'w')\n",
+      "f.write(s)\n",
+      "f.close()\n",
+      "\n",
+      "print \"Modified File now reads :\"\n",
+      "f = open('madurai_1','r')\n",
+      "print f.read()\n",
+      "f.close()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Madurai Contains :\n",
+        "Madurai is an ancient city,ruled by pandyas,Tirumalai nayakar was the last prominent ruler who left many monuments; but meenakshi temple has no age\n",
+        "\n",
+        "Modified File now reads :\n",
+        "Madurai is an ancient city,ruled by pandyas,Tirumalai nayakar was the last prominent ruler who left many monuments; but meenakshi shrine has no age\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 7
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "15.18.1,page number:241"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import re\n",
+      "print \"Enter a stream of characters with integers embedded\"\n",
+      "c=raw_input()\n",
+      "print \"Integr is : \",re.sub(\"[^0-9]\", \"\", c)\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Enter a stream of characters with integers embedded\n"
+       ]
+      },
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "ab+&473.tce\n"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Integr is :  473\n"
+       ]
+      }
+     ],
+     "prompt_number": 8
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file