diff options
Diffstat (limited to 'Let_us_C/chapter-12.ipynb')
| -rw-r--r-- | Let_us_C/chapter-12.ipynb | 2351 |
1 files changed, 2351 insertions, 0 deletions
diff --git a/Let_us_C/chapter-12.ipynb b/Let_us_C/chapter-12.ipynb new file mode 100644 index 00000000..f0567d09 --- /dev/null +++ b/Let_us_C/chapter-12.ipynb @@ -0,0 +1,2351 @@ +{
+ "metadata": {
+ "name": "chapter-12.ipynb"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h1>Chapter 12: File Input/Output <h1>"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Display Contents of a File , Page number: 417<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to display contents of a file on screen.'''\n",
+ "\n",
+ "fp = open (\"C:/Users/Akshatha M/Desktop/carrot.txt\", \"r\" ) #open file in read mode\n",
+ "while ( 1 ):\n",
+ " ch = fp.read(1)\n",
+ " if not ch :\n",
+ " break\n",
+ " print ch\n",
+ "\n",
+ "fp.close() #close file\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "M\n",
+ "e\n",
+ "t\n",
+ "h\n",
+ "o\n",
+ "d\n",
+ "\n",
+ "\n",
+ "T\n",
+ "h\n",
+ "r\n",
+ "o\n",
+ "u\n",
+ "g\n",
+ "h\n",
+ "l\n",
+ "y\n",
+ " \n",
+ "w\n",
+ "a\n",
+ "s\n",
+ " \n",
+ "b\n",
+ "o\n",
+ "t\n",
+ "h\n",
+ " \n",
+ "b\n",
+ "e\n",
+ "e\n",
+ "t\n",
+ "r\n",
+ "o\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "c\n",
+ "a\n",
+ "r\n",
+ "r\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "r\n",
+ "e\n",
+ "m\n",
+ "o\n",
+ "v\n",
+ "e\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "m\n",
+ "u\n",
+ "d\n",
+ " \n",
+ "o\n",
+ "n\n",
+ " \n",
+ "b\n",
+ "e\n",
+ "e\n",
+ "t\n",
+ "r\n",
+ "o\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "h\n",
+ "a\n",
+ "i\n",
+ "r\n",
+ " \n",
+ "o\n",
+ "n\n",
+ " \n",
+ "c\n",
+ "a\n",
+ "r\n",
+ "r\n",
+ "o\n",
+ "t\n",
+ "\n",
+ "\n",
+ "P\n",
+ "e\n",
+ "e\n",
+ "l\n",
+ " \n",
+ "o\n",
+ "f\n",
+ "f\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "c\n",
+ "a\n",
+ "r\n",
+ "r\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "s\n",
+ "k\n",
+ "i\n",
+ "n\n",
+ ".\n",
+ " \n",
+ "d\n",
+ "o\n",
+ " \n",
+ "n\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "p\n",
+ "e\n",
+ "e\n",
+ "l\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "r\n",
+ "a\n",
+ "d\n",
+ "d\n",
+ "i\n",
+ "s\n",
+ "h\n",
+ " \n",
+ "s\n",
+ "k\n",
+ "i\n",
+ "n\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "a\n",
+ "v\n",
+ "o\n",
+ "i\n",
+ "d\n",
+ " \n",
+ "p\n",
+ "o\n",
+ "s\n",
+ "s\n",
+ "i\n",
+ "b\n",
+ "l\n",
+ "e\n",
+ " \n",
+ "l\n",
+ "o\n",
+ "s\n",
+ "s\n",
+ " \n",
+ "o\n",
+ "f\n",
+ " \n",
+ "v\n",
+ "i\n",
+ "t\n",
+ "a\n",
+ "m\n",
+ "i\n",
+ "n\n",
+ "s\n",
+ "\n",
+ "\n",
+ "C\n",
+ "u\n",
+ "t\n",
+ " \n",
+ "e\n",
+ "a\n",
+ "c\n",
+ "h\n",
+ " \n",
+ "b\n",
+ "e\n",
+ "e\n",
+ "t\n",
+ "r\n",
+ "o\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "c\n",
+ "a\n",
+ "r\n",
+ "r\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "i\n",
+ "n\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "4\n",
+ " \n",
+ "h\n",
+ "a\n",
+ "l\n",
+ "v\n",
+ "e\n",
+ "s\n",
+ "\n",
+ "\n",
+ "P\n",
+ "r\n",
+ "e\n",
+ "a\n",
+ "s\n",
+ "s\n",
+ "u\n",
+ "r\n",
+ "e\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "k\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "b\n",
+ "e\n",
+ "e\n",
+ "t\n",
+ "r\n",
+ "o\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "c\n",
+ "a\n",
+ "r\n",
+ "r\n",
+ "o\n",
+ "t\n",
+ ".\n",
+ " \n",
+ "m\n",
+ "a\n",
+ "k\n",
+ "e\n",
+ " \n",
+ "3\n",
+ " \n",
+ "w\n",
+ "h\n",
+ "i\n",
+ "s\n",
+ "t\n",
+ "l\n",
+ "e\n",
+ "s\n",
+ " \n",
+ "s\n",
+ "o\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ "t\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ "y\n",
+ " \n",
+ "b\n",
+ "e\n",
+ "c\n",
+ "o\n",
+ "m\n",
+ "e\n",
+ " \n",
+ "v\n",
+ "e\n",
+ "r\n",
+ "y\n",
+ " \n",
+ "s\n",
+ "m\n",
+ "o\n",
+ "o\n",
+ "t\n",
+ "h\n",
+ "\n",
+ "\n",
+ "D\n",
+ "r\n",
+ "a\n",
+ "i\n",
+ "n\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "r\n",
+ "e\n",
+ "s\n",
+ "e\n",
+ "r\n",
+ "v\n",
+ "e\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "w\n",
+ "a\n",
+ "t\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "a\n",
+ "f\n",
+ "t\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "p\n",
+ "r\n",
+ "e\n",
+ "s\n",
+ "s\n",
+ "u\n",
+ "r\n",
+ "e\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "k\n",
+ "i\n",
+ "n\n",
+ "g\n",
+ ".\n",
+ "\n",
+ "\n",
+ "M\n",
+ "a\n",
+ "s\n",
+ "h\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "k\n",
+ "e\n",
+ "d\n",
+ " \n",
+ "p\n",
+ "i\n",
+ "e\n",
+ "c\n",
+ "e\n",
+ "s\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "a\n",
+ "l\n",
+ "l\n",
+ "o\n",
+ "w\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "l\n",
+ "\n",
+ "\n",
+ "C\n",
+ "u\n",
+ "t\n",
+ " \n",
+ "o\n",
+ "n\n",
+ "i\n",
+ "o\n",
+ "n\n",
+ "s\n",
+ " \n",
+ "i\n",
+ "n\n",
+ "t\n",
+ "o\n",
+ " \n",
+ "c\n",
+ "u\n",
+ "b\n",
+ "e\n",
+ "s\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "s\n",
+ "a\n",
+ "u\n",
+ "t\n",
+ "e\n",
+ " \n",
+ "t\n",
+ "i\n",
+ "l\n",
+ "l\n",
+ " \n",
+ "g\n",
+ "o\n",
+ "l\n",
+ "d\n",
+ "e\n",
+ "n\n",
+ " \n",
+ "b\n",
+ "r\n",
+ "o\n",
+ "w\n",
+ "n\n",
+ " \n",
+ "o\n",
+ "n\n",
+ " \n",
+ "o\n",
+ "i\n",
+ "l\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "a\n",
+ "l\n",
+ "l\n",
+ "o\n",
+ "w\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "l\n",
+ "\n",
+ "\n",
+ "A\n",
+ "f\n",
+ "t\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "l\n",
+ "i\n",
+ "n\n",
+ "g\n",
+ " \n",
+ "g\n",
+ "r\n",
+ "i\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "m\n",
+ "a\n",
+ "s\n",
+ "h\n",
+ "e\n",
+ "d\n",
+ " \n",
+ "b\n",
+ "e\n",
+ "e\n",
+ "t\n",
+ "r\n",
+ "o\n",
+ "o\n",
+ "t\n",
+ ",\n",
+ " \n",
+ "c\n",
+ "a\n",
+ "r\n",
+ "r\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "s\n",
+ "a\n",
+ "u\n",
+ "t\n",
+ "e\n",
+ "d\n",
+ " \n",
+ "o\n",
+ "n\n",
+ "i\n",
+ "o\n",
+ "n\n",
+ "s\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ " \n",
+ "i\n",
+ "n\n",
+ " \n",
+ "a\n",
+ " \n",
+ "m\n",
+ "i\n",
+ "x\n",
+ "y\n",
+ ".\n",
+ " \n",
+ "a\n",
+ "d\n",
+ "d\n",
+ " \n",
+ "e\n",
+ "n\n",
+ "o\n",
+ "u\n",
+ "g\n",
+ "h\n",
+ " \n",
+ "w\n",
+ "a\n",
+ "t\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "m\n",
+ "a\n",
+ "k\n",
+ "e\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ " \n",
+ "n\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "v\n",
+ "e\n",
+ "r\n",
+ "y\n",
+ " \n",
+ "f\n",
+ "i\n",
+ "n\n",
+ "e\n",
+ ".\n",
+ "\n",
+ "\n",
+ "N\n",
+ "o\n",
+ "w\n",
+ " \n",
+ "s\n",
+ "t\n",
+ "r\n",
+ "a\n",
+ "i\n",
+ "n\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "g\n",
+ "r\n",
+ "i\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ ".\n",
+ "\n",
+ "\n",
+ "T\n",
+ "a\n",
+ "k\n",
+ "e\n",
+ " \n",
+ "s\n",
+ "o\n",
+ "m\n",
+ "e\n",
+ " \n",
+ "b\n",
+ "u\n",
+ "t\n",
+ "t\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "i\n",
+ "n\n",
+ " \n",
+ "a\n",
+ " \n",
+ "v\n",
+ "e\n",
+ "s\n",
+ "s\n",
+ "e\n",
+ "l\n",
+ " \n",
+ "a\n",
+ "d\n",
+ "d\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "g\n",
+ "a\n",
+ "r\n",
+ "l\n",
+ "i\n",
+ "c\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ ",\n",
+ "g\n",
+ "i\n",
+ "n\n",
+ "g\n",
+ "e\n",
+ "r\n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "g\n",
+ "r\n",
+ "e\n",
+ "e\n",
+ "n\n",
+ " \n",
+ "c\n",
+ "h\n",
+ "i\n",
+ "l\n",
+ "l\n",
+ "i\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "s\n",
+ "a\n",
+ "u\n",
+ "t\n",
+ "e\n",
+ " \n",
+ "f\n",
+ "o\n",
+ "r\n",
+ " \n",
+ "s\n",
+ "o\n",
+ "m\n",
+ "e\n",
+ " \n",
+ "t\n",
+ "i\n",
+ "m\n",
+ "e\n",
+ " \n",
+ "t\n",
+ "i\n",
+ "l\n",
+ "l\n",
+ " \n",
+ "u\n",
+ " \n",
+ "g\n",
+ "e\n",
+ "t\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "s\n",
+ "p\n",
+ "e\n",
+ "c\n",
+ "i\n",
+ "f\n",
+ "i\n",
+ "c\n",
+ " \n",
+ "g\n",
+ "a\n",
+ "r\n",
+ "l\n",
+ "i\n",
+ "c\n",
+ "-\n",
+ "b\n",
+ "e\n",
+ "i\n",
+ "n\n",
+ "g\n",
+ "-\n",
+ "f\n",
+ "r\n",
+ "i\n",
+ "e\n",
+ "d\n",
+ " \n",
+ "s\n",
+ "m\n",
+ "e\n",
+ "l\n",
+ "l\n",
+ "\n",
+ "\n",
+ "A\n",
+ "d\n",
+ "d\n",
+ " \n",
+ "m\n",
+ "o\n",
+ "o\n",
+ "n\n",
+ "g\n",
+ " \n",
+ "s\n",
+ "p\n",
+ "r\n",
+ "o\n",
+ "u\n",
+ "t\n",
+ "s\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "s\n",
+ "a\n",
+ "u\n",
+ "t\n",
+ "e\n",
+ ",\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "v\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "w\n",
+ "i\n",
+ "t\n",
+ "h\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "l\n",
+ "i\n",
+ "d\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "l\n",
+ "e\n",
+ "t\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "k\n",
+ " \n",
+ "f\n",
+ "o\n",
+ "r\n",
+ " \n",
+ "5\n",
+ " \n",
+ "m\n",
+ "i\n",
+ "n\n",
+ "s\n",
+ "\n",
+ "\n",
+ "N\n",
+ "o\n",
+ "w\n",
+ " \n",
+ "a\n",
+ "d\n",
+ "d\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "s\n",
+ "t\n",
+ "r\n",
+ "a\n",
+ "i\n",
+ "n\n",
+ " \n",
+ "o\n",
+ "f\n",
+ " \n",
+ "b\n",
+ "e\n",
+ "e\n",
+ "t\n",
+ "r\n",
+ "o\n",
+ "o\n",
+ "t\n",
+ ",\n",
+ "c\n",
+ "a\n",
+ "r\n",
+ "r\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "o\n",
+ "n\n",
+ "i\n",
+ "o\n",
+ "n\n",
+ "s\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ "\n",
+ "\n",
+ "A\n",
+ "d\n",
+ "d\n",
+ " \n",
+ "6\n",
+ " \n",
+ "c\n",
+ "u\n",
+ "p\n",
+ "s\n",
+ " \n",
+ "o\n",
+ "f\n",
+ " \n",
+ "w\n",
+ "a\n",
+ "t\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "i\n",
+ "t\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "a\n",
+ "l\n",
+ "s\n",
+ "o\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "w\n",
+ "a\n",
+ "t\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "r\n",
+ "e\n",
+ "s\n",
+ "e\n",
+ "r\n",
+ "v\n",
+ "e\n",
+ "d\n",
+ " \n",
+ "a\n",
+ "t\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "t\n",
+ "i\n",
+ "m\n",
+ "e\n",
+ " \n",
+ "o\n",
+ "f\n",
+ " \n",
+ "p\n",
+ "r\n",
+ "e\n",
+ "s\n",
+ "s\n",
+ "u\n",
+ "r\n",
+ "e\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "k\n",
+ "i\n",
+ "n\n",
+ "g\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "b\n",
+ "e\n",
+ "e\n",
+ "t\n",
+ "r\n",
+ "o\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "c\n",
+ "a\n",
+ "r\n",
+ "r\n",
+ "o\n",
+ "t\n",
+ ".\n",
+ "\n",
+ "\n",
+ "A\n",
+ "d\n",
+ "d\n",
+ " \n",
+ "s\n",
+ "a\n",
+ "l\n",
+ "t\n",
+ ",\n",
+ " \n",
+ "c\n",
+ "i\n",
+ "n\n",
+ "n\n",
+ "a\n",
+ "m\n",
+ "o\n",
+ "n\n",
+ ",\n",
+ " \n",
+ "c\n",
+ "u\n",
+ "m\n",
+ "m\n",
+ "i\n",
+ "n\n",
+ ",\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "r\n",
+ "i\n",
+ "a\n",
+ "n\n",
+ "d\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "p\n",
+ "o\n",
+ "w\n",
+ "d\n",
+ "e\n",
+ "r\n",
+ ",\n",
+ "l\n",
+ "e\n",
+ "m\n",
+ "o\n",
+ "n\n",
+ " \n",
+ "j\n",
+ "u\n",
+ "i\n",
+ "c\n",
+ "e\n",
+ "\n",
+ "\n",
+ "B\n",
+ "r\n",
+ "i\n",
+ "n\n",
+ "g\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "a\n",
+ " \n",
+ "b\n",
+ "o\n",
+ "i\n",
+ "l\n",
+ ",\n",
+ " \n",
+ "l\n",
+ "e\n",
+ "t\n",
+ " \n",
+ "s\n",
+ "i\n",
+ "m\n",
+ "m\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "f\n",
+ "o\n",
+ "r\n",
+ " \n",
+ "a\n",
+ " \n",
+ "f\n",
+ "e\n",
+ "w\n",
+ " \n",
+ "m\n",
+ "i\n",
+ "n\n",
+ "s\n",
+ "\n",
+ "\n",
+ "M\n",
+ "a\n",
+ "k\n",
+ "e\n",
+ " \n",
+ "a\n",
+ " \n",
+ "f\n",
+ "i\n",
+ "n\n",
+ "e\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ " \n",
+ "o\n",
+ "f\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "r\n",
+ "n\n",
+ "f\n",
+ "l\n",
+ "o\n",
+ "u\n",
+ "r\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "a\n",
+ "d\n",
+ "d\n",
+ " \n",
+ "i\n",
+ "t\n",
+ " \n",
+ "w\n",
+ "h\n",
+ "i\n",
+ "l\n",
+ "e\n",
+ " \n",
+ "s\n",
+ "t\n",
+ "i\n",
+ "r\n",
+ "r\n",
+ "i\n",
+ "n\n",
+ "g\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "a\n",
+ "v\n",
+ "o\n",
+ "i\n",
+ "d\n",
+ " \n",
+ "l\n",
+ "u\n",
+ "m\n",
+ "p\n",
+ "s\n",
+ "\n",
+ "\n",
+ "T\n",
+ "i\n",
+ "l\n",
+ " \n",
+ "f\n",
+ "o\n",
+ "r\n",
+ " \n",
+ "s\n",
+ "o\n",
+ "m\n",
+ "e\n",
+ "m\n",
+ "o\n",
+ "r\n",
+ "e\n",
+ " \n",
+ "t\n",
+ "i\n",
+ "m\n",
+ "e\n",
+ " \n",
+ "s\n",
+ "o\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "a\n",
+ "t\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "r\n",
+ "n\n",
+ "f\n",
+ "l\n",
+ "o\n",
+ "u\n",
+ "r\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "s\n",
+ "t\n",
+ "e\n",
+ " \n",
+ "i\n",
+ "s\n",
+ " \n",
+ "c\n",
+ "o\n",
+ "o\n",
+ "k\n",
+ "e\n",
+ "d\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "m\n",
+ "i\n",
+ "x\n",
+ "e\n",
+ "d\n",
+ " \n",
+ "w\n",
+ "e\n",
+ "l\n",
+ "l\n",
+ "\n",
+ "\n",
+ "T\n",
+ "a\n",
+ "k\n",
+ "e\n",
+ " \n",
+ "o\n",
+ "i\n",
+ "l\n",
+ " \n",
+ "i\n",
+ "n\n",
+ " \n",
+ "a\n",
+ " \n",
+ "k\n",
+ "a\n",
+ "d\n",
+ "h\n",
+ "a\n",
+ "i\n",
+ " \n",
+ "t\n",
+ "o\n",
+ " \n",
+ "f\n",
+ "r\n",
+ "y\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "n\n",
+ "o\n",
+ "o\n",
+ "d\n",
+ "l\n",
+ "e\n",
+ "s\n",
+ ".\n",
+ "f\n",
+ "r\n",
+ "y\n",
+ " \n",
+ "t\n",
+ "i"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "\n",
+ "l\n",
+ "l\n",
+ " \n",
+ "g\n",
+ "o\n",
+ "l\n",
+ "d\n",
+ "e\n",
+ "n\n",
+ " \n",
+ "b\n",
+ "r\n",
+ "o\n",
+ "w\n",
+ "n\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "r\n",
+ "e\n",
+ "s\n",
+ "e\n",
+ "r\n",
+ "v\n",
+ "e\n",
+ " \n",
+ "o\n",
+ "n\n",
+ " \n",
+ "a\n",
+ " \n",
+ "t\n",
+ "i\n",
+ "s\n",
+ "s\n",
+ "u\n",
+ "e\n",
+ " \n",
+ "p\n",
+ "a\n",
+ "p\n",
+ "e\n",
+ "r\n",
+ "\n",
+ "\n",
+ "C\n",
+ "r\n",
+ "u\n",
+ "s\n",
+ "h\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "n\n",
+ "o\n",
+ "o\n",
+ "d\n",
+ "l\n",
+ "e\n",
+ "s\n",
+ " \n",
+ "n\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "t\n",
+ "o\n",
+ "o\n",
+ " \n",
+ "m\n",
+ "u\n",
+ "c\n",
+ "h\n",
+ "\n",
+ "\n",
+ "S\n",
+ "e\n",
+ "r\n",
+ "v\n",
+ "e\n",
+ " \n",
+ "s\n",
+ "t\n",
+ "e\n",
+ "a\n",
+ "m\n",
+ "i\n",
+ "n\n",
+ "g\n",
+ " \n",
+ "h\n",
+ "o\n",
+ "t\n",
+ " \n",
+ "i\n",
+ "n\n",
+ " \n",
+ "s\n",
+ "o\n",
+ "u\n",
+ "p\n",
+ " \n",
+ "b\n",
+ "o\n",
+ "w\n",
+ "l\n",
+ "s\n",
+ " \n",
+ "a\n",
+ "d\n",
+ "d\n",
+ " \n",
+ "s\n",
+ "o\n",
+ "m\n",
+ "e\n",
+ " \n",
+ "b\n",
+ "u\n",
+ "t\n",
+ "t\n",
+ "e\n",
+ "r\n",
+ " \n",
+ "a\n",
+ "n\n",
+ "d\n",
+ " \n",
+ "t\n",
+ "o\n",
+ "p\n",
+ " \n",
+ "w\n",
+ "i\n",
+ "t\n",
+ "h\n",
+ " \n",
+ "t\n",
+ "h\n",
+ "e\n",
+ " \n",
+ "c\n",
+ "r\n",
+ "i\n",
+ "s\n",
+ "p\n",
+ "y\n",
+ " \n",
+ "n\n",
+ "o\n",
+ "o\n",
+ "d\n",
+ "l\n",
+ "e\n",
+ "s\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Opening a File , Page number: 421<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to check whether a file has been opened successfully before\n",
+ "trying to read or write to the file'''\n",
+ "\n",
+ "try :\n",
+ " fp = open (\"C:/Users/Akshatha M/Desktop/carrot.txt\", \"r\" )#open file in read mode and check if file is opened successfully\n",
+ "except:\n",
+ " print \"cannot open file\" \n",
+ " exit()\n",
+ "\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "cannot open file\n"
+ ]
+ }
+ ],
+ "prompt_number": "*"
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Counting Characters,Tabs,Spaces and Newlines , Page number: 423<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to count chars, spaces, tabs and newlines in a file.'''\n",
+ "\n",
+ "#Variable declaration\n",
+ "nol = 0\n",
+ "Not = 0\n",
+ "nob = 0\n",
+ "noc = 0\n",
+ "\n",
+ "fp = open (\"C:/Users/Akshatha M/Desktop/carrot.txt\", \"r\" ) #open file in read mode\n",
+ "while ( 1 ):\n",
+ " ch = fp.read(1)\n",
+ " if not ch :\n",
+ " break\n",
+ " noc = noc + 1 #number of chars\n",
+ " if ( ch == \" \" ):\n",
+ " nob = nob + 1 #number of spaces\n",
+ " if ( ch == \"\\n\" ):\n",
+ " nol = nol + 1 # number of newlines\n",
+ " if ( ch == \"\\t\" ):\n",
+ " Not = Not + 1 #number of tabs\n",
+ "\n",
+ "fp.close() #close file\n",
+ "\n",
+ "#Result\n",
+ "print \"Number of characters = \", noc \n",
+ "print \"Number of blanks = \", nob \n",
+ "print \"Number of tabs = \", Not \n",
+ "print \"Number of lines = \", nol \n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Number of characters = 1495\n",
+ "Number of blanks = 254\n",
+ "Number of tabs = 0\n",
+ "Number of lines = 20\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>File Copy , Page number: 424<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to take the contents of a file and\n",
+ "copy them into another file, character by character.'''\n",
+ "\n",
+ "fs = open (\"C:/Users/Akshatha M/Desktop/carrot.txt\", \"r\" ) #open file in read mode\n",
+ "if(not fs):\n",
+ " print \"Cannot open source file\"\n",
+ " exit()\n",
+ "\n",
+ "ft = open ( \"C:/Users/Akshatha M/Desktop/temp.txt\", \"w\" ) #open file in write mode\n",
+ "if(not ft):\n",
+ " print \"Cannot open target file\"\n",
+ " fs.close() \n",
+ " exit()\n",
+ " \n",
+ "while ( 1 ):\n",
+ " ch = fs.read(1)\n",
+ " if not ch :\n",
+ " break\n",
+ " else:\n",
+ " ft.writelines(ch) #write into target file\n",
+ "\n",
+ "#closen files\n",
+ "fs.close()\n",
+ "ft.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Writing Strings to Files, Page number: 427<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to receive strings from keyboard and write them to file'''\n",
+ "\n",
+ "fp = open ( \"C:/Users/Akshatha M/Desktop/temp.txt\", \"w\" ) #open file in write mode\n",
+ "if(not fp):\n",
+ " print \"Cannot open target file\" \n",
+ " exit()\n",
+ "\n",
+ "print \"Enter a few lines of text:\" \n",
+ "#s=input(\"\") #Input strings from keyboard\n",
+ "s = \"File written\"\n",
+ "print s\n",
+ "while ( len(s) > 0 ):\n",
+ " fp.writelines(s) #write into file\n",
+ " fp.writelines(\"\\n\")\n",
+ " #s=input(\"\") #Input strings from keyboard\n",
+ " s=\"\"\n",
+ " \n",
+ "#close files\n",
+ "fp.close()\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter a few lines of text:\n",
+ "File written\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Reading Strings from Files , Page number: 429<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to reads strings from the file and displays them on screen.'''\n",
+ "\n",
+ "fp = open (\"C:/Users/Akshatha M/Desktop/carrot.txt\", \"r\" ) #open file in read mode\n",
+ "if ( not fp ):\n",
+ " print \"Cannot open file\" \n",
+ " exit( ) \n",
+ "\n",
+ "while ( 1 ) :#Read strings from file\n",
+ " s = fp.read(79)\n",
+ " if(s):\n",
+ " print s\n",
+ " else:\n",
+ " break\n",
+ " \n",
+ "\n",
+ "fp.close() #close file\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Method\n",
+ "Throughly was both beetroot and carrot to remove the mud on beetroot and\n",
+ " the hair on carrot\n",
+ "Peel off the carrot skin. do not peel the raddish skin to a\n",
+ "void possible loss of vitamins\n",
+ "Cut each beetroot and carrot in to 4 halves\n",
+ "Prea\n",
+ "ssure cook the beetroot and carrot. make 3 whistles so thet they become very sm\n",
+ "ooth\n",
+ "Drain and reserve the water after pressure cooking.\n",
+ "Mash the cooked pieces\n",
+ " and allow to cool\n",
+ "Cut onions into cubes and saute till golden brown on oil and\n",
+ " allow to cool\n",
+ "After cooling grind the mashed beetroot, carrot and sauted onion\n",
+ "s to paste in a mixy. add enough water to make paste not very fine.\n",
+ "Now strain \n",
+ "the grind paste.\n",
+ "Take some butter in a vessel add the garlic paste,gingerpaste \n",
+ "and green chilli paste and saute for some time till u get the specific garlic-b\n",
+ "eing-fried smell\n",
+ "Add moong sprouts and saute, cover with the lid and let cook f\n",
+ "or 5 mins\n",
+ "Now add the strain of beetroot,carrot and onions paste\n",
+ "Add 6 cups of \n",
+ "water to it and also the water reserved at the time of pressure cooking the bee\n",
+ "troot and carrot.\n",
+ "Add salt, cinnamon, cummin, coriander powder,lemon juice\n",
+ "Brin\n",
+ "g to a boil, let simmer for a few mins\n",
+ "Make a fine paste of cornflour and add i\n",
+ "t while stirring to avoid lumps\n",
+ "Til for somemore time so that the cornflour pas\n",
+ "te is cooked and mixed well\n",
+ "Take oil in a kadhai to fry the noodles.fry till go\n",
+ "lden brown and reserve on a tissue paper\n",
+ "Crush the noodles not too much\n",
+ "Serve s\n",
+ "teaming hot in soup bowls add some butter and top with the crispy noodles\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Writing Records to Files , Page number: 431<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to write records to a file using structure'''\n",
+ "\n",
+ "from collections import namedtuple\n",
+ "\n",
+ "#Variable declaration\n",
+ "another = 'Y'\n",
+ "\n",
+ "#Structure defintion\n",
+ "struct_emp = namedtuple(\"struct_emp\", \"name age bs\")\n",
+ "\n",
+ "\n",
+ "fp = open ( \"C:/Users/Akshatha M/Desktop/Employee.dat\", \"w\" ) #open file in write mode\n",
+ "if(not fp):\n",
+ " print \"Cannot open target file\"\n",
+ " exit()\n",
+ "\n",
+ "while ( another == 'Y' ):\n",
+ " print \"Enter name, age and basic salary: \" \n",
+ " #en,ea,ebs = input(\"\").split()\n",
+ " en =\"John\"\n",
+ " ea=\"34\"\n",
+ " ebs=\"25000\"\n",
+ " print en,ea,ebs\n",
+ " e = struct_emp(en,ea,ebs)\n",
+ " fp.writelines(e) #write into file\n",
+ " fp.writelines(\"\\n\")\n",
+ " #another = input( \"Add another record (Y/N): \" ) \n",
+ " print \"Add another record (Y/N): \"\n",
+ " another = 'N'\n",
+ " print another\n",
+ "#close file\n",
+ "fp.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter name, age and basic salary: \n",
+ "John 34 25000\n",
+ "Add another record (Y/N): \n",
+ "N\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Reading Records from File , Page number: 433<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to read records from a file using structure'''\n",
+ "\n",
+ "from collections import namedtuple\n",
+ "#Structure defintion\n",
+ "struct_emp = namedtuple(\"struct_emp\", \"name age bs\")\n",
+ "\n",
+ "\n",
+ "fp = open ( \"C:/Users/Akshatha M/Desktop/Employee.txt\", \"r\" ) #open file in read mode\n",
+ "if(not fp):\n",
+ " print \"Cannot open target file\"\n",
+ " exit()\n",
+ "\n",
+ "while ( 1 ):\n",
+ " s = fp.readline()\n",
+ " if(s):\n",
+ " en,ea,ebs = s.split()\n",
+ " e = struct_emp(en,ea,ebs) #Read record\n",
+ " print e.name, e.age, e.bs \n",
+ " else:\n",
+ " break\n",
+ " \n",
+ "#close file\n",
+ "fp.close()\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "John 34 25000\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Copying Binary Files , Page number: 434<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to copy text as well as binary files'''\n",
+ "\n",
+ "fs = open (\"C:/Users/Akshatha M/Desktop/Project1.exe\", \"rb\" ) #open file in read binary mode\n",
+ "if(not fs):\n",
+ " print \"Cannot open source file\"\n",
+ " exit()\n",
+ "\n",
+ "ft = open ( \"C:/Users/Akshatha M/Desktop/NewProject1.exe\", \"wb\" ) #open file in write binary mode\n",
+ "if(not ft):\n",
+ " print \"Cannot open target file\"\n",
+ " fs.close() \n",
+ " exit()\n",
+ " \n",
+ "while ( 1 ):\n",
+ " ch = fs.read(1)\n",
+ " if not ch :\n",
+ " break\n",
+ " else:\n",
+ " ft.write(ch) #write into target file\n",
+ "\n",
+ "#closen files\n",
+ "fs.close()\n",
+ "ft.close()\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 12
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Writing To Files in Binary Mode, Page number: 438<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to receive records from keyboard and write them to a file in binary mode'''\n",
+ "\n",
+ "from collections import namedtuple\n",
+ "\n",
+ "#Variable declaration\n",
+ "another = 'Y'\n",
+ "\n",
+ "#Structure defintion\n",
+ "struct_emp = namedtuple(\"struct_emp\", \"name age bs\")\n",
+ "\n",
+ "fp = open ( \"C:/Users/Akshatha M/Desktop/Employee.dat\", \"wb\" ) #open file in write mode\n",
+ "if(not fp):\n",
+ " print \"Cannot open target file\" \n",
+ " exit()\n",
+ "\n",
+ "while ( another == 'Y' ):\n",
+ " print ( \"Enter name, age and basic salary: \" )\n",
+ " #en,ea,ebs = input(\"\").split()\n",
+ " en =\"John\"\n",
+ " ea=\"34\"\n",
+ " ebs=\"25000\"\n",
+ " print en,ea,ebs\n",
+ " e = struct_emp(en,ea,ebs)\n",
+ " #write into file\n",
+ " fp.write(b'e.name')\n",
+ " fp.write(b'e.age')\n",
+ " fp.write(b'e.bs')\n",
+ " fp.write(b'\\n')\n",
+ " #another = input( \"Add another record (Y/N): \" ) \n",
+ " print \"Add another record (Y/N): \"\n",
+ " another = 'N'\n",
+ " print another\n",
+ "\n",
+ "#close file\n",
+ "fp.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter name, age and basic salary: \n",
+ "John 34 25000\n",
+ "Add another record (Y/N): \n",
+ "N\n"
+ ]
+ }
+ ],
+ "prompt_number": 13
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Reading From Binary Files , Page number: 440<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to read records from binary file and displays them on VDU'''\n",
+ "\n",
+ "from collections import namedtuple\n",
+ "#Structure defintion\n",
+ "struct_emp = namedtuple(\"struct_emp\", \"name age bs\")\n",
+ "\n",
+ "\n",
+ "fp = open ( \"C:/Users/Akshatha M/Desktop/Employee.txt\", \"rb\" ) #open file in read mode\n",
+ "if(not fp):\n",
+ " print \"Cannot open target file\" \n",
+ " exit()\n",
+ "\n",
+ "while ( 1 ):\n",
+ " s = fp.readline()\n",
+ " if(s):\n",
+ " en,ea,ebs = s.split()\n",
+ " e = struct_emp(en,ea,ebs) #Read record\n",
+ " print e.name, e.age, e.bs \n",
+ " else:\n",
+ " break\n",
+ " \n",
+ "#close file\n",
+ "fp.close()\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "John 34 25000\n"
+ ]
+ }
+ ],
+ "prompt_number": 14
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Database Management, Page number: 442<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''A menu-driven program for elementary database management'''\n",
+ "\n",
+ "import os\n",
+ "from collections import namedtuple\n",
+ "#Structure defintion\n",
+ "struct_emp = namedtuple(\"struct_emp\", \"name age bs\")\n",
+ "\n",
+ "fp = open ( \"C:/Users/Akshatha M/Desktop/Employee.txt\", \"r+b\")\n",
+ "if ( not fp ):\n",
+ " fp = open ( \"C:/Users/Akshatha M/Desktop/Employee.txt\", \"w+b\" )\n",
+ " if ( not fp ):\n",
+ " print \"Cannot open file\" \n",
+ " exit( )\n",
+ "\n",
+ "while ( 1 ):\n",
+ " print \" 1. Add Records\"\n",
+ " print \" 2. List Records\"\n",
+ " print \" 3. Modify Records\"\n",
+ " print \" 4. Delete Records\" \n",
+ " print \" 0. Exit\" \n",
+ " #choice = input(\"\\nYour choice\")\n",
+ " print \"\\nYour choice\"\n",
+ " choice = 1\n",
+ " if(choice == '1'):\n",
+ " another = 'Y'\n",
+ " while ( another == 'Y' ):\n",
+ " print ( \"Enter name, age and basic salary: \" )\n",
+ " en,ea,ebs = input(\"\").split()\n",
+ " e = struct_emp(en,ea,ebs)\n",
+ " #write into file\n",
+ " fp.write(b'e.name')\n",
+ " fp.write(b' ')\n",
+ " fp.write(b'e.age')\n",
+ " fp.write(b' ')\n",
+ " fp.write(b'e.bs')\n",
+ " fp.write(b'\\n')\n",
+ " another = input( \"Add another record (Y/N): \" )\n",
+ " elif(choice == '2'):\n",
+ " fp.seek(0,0)\n",
+ " while ( 1 ):\n",
+ " s = fp.readline()\n",
+ " if(s):\n",
+ " en,j1,ea,j2,ebs = s.split()\n",
+ " e = struct_emp(en,ea,ebs) #Read record\n",
+ " print ( e.name, e.age, e.bs )\n",
+ " else:\n",
+ " break\n",
+ " elif(choice == '3'):\n",
+ " another = 'Y'\n",
+ " while ( another == 'Y' ):\n",
+ " empname =input(\"Enter name of employee to modify \" )\n",
+ " fp.seek(0,0)\n",
+ " while (fp.readline()):\n",
+ " if ( b'empname' == b'e.name' ):\n",
+ " en,ea,ebs = input(\"Enter new name, age & bs\" ).spilt()\n",
+ " e = struct_emp(en,ea,ebs)\n",
+ " cur = fp.tell()\n",
+ " fp.write(b'e.name')\n",
+ " fp.write(b'e.age')\n",
+ " fp.write(b'e.bs')\n",
+ " fp.write(b'\\n')\n",
+ " break\n",
+ " print ( \"\\nModify another Record (Y/N) \" )\n",
+ " another = input(\"\")\n",
+ " elif(choice == '4'):\n",
+ " another = 'Y'\n",
+ " while ( another == 'Y' ):\n",
+ " empname = input(\"Enter name of employee to delete \" )\n",
+ " ft = open ( \"C:/Users/Akshatha M/Desktop/temp.txt\", \"wb\" )\n",
+ " fp.seek(0,0)\n",
+ " while ( 1 ):\n",
+ " s = fp.readline()\n",
+ " if(s):\n",
+ " if ( not(b'empname' == b'e.name' )):\n",
+ " ft.write(s)\n",
+ " else:\n",
+ " break\n",
+ " fp.close()\n",
+ " ft.close()\n",
+ " os.remove(\"C:/Users/Akshatha M/Desktop/Employee.txt\")\n",
+ " os.rename ( \"C:/Users/Akshatha M/Desktop/temp.txt\", \"C:/Users/Akshatha M/Desktop/Employee.txt\" )\n",
+ " fp = open ( \"C:/Users/Akshatha M/Desktop/Employee.txt\", \"r+b\" )\n",
+ " print ( \"Delete another Record (Y/N) \" )\n",
+ " another = input(\"\")\n",
+ "\n",
+ " else:\n",
+ " fp.close()#close file\n",
+ " exit( )\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": []
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Low Level File Copy, Page number: 448<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''File-copy program which copies text, .com and .exe files'''\n",
+ "\n",
+ "#source=input( \"Enter source file name \" ) \n",
+ "print \"Enter source file name \" \n",
+ "source = \"Employee.txt\"\n",
+ "print source\n",
+ "source=\"C:/Users/Akshatha M/Desktop/\"+source\n",
+ "\n",
+ "inhandle = open (source, \"rb\" ) #open file in read binary mode\n",
+ "if(not inhandle):\n",
+ " print \"Cannot open file\"\n",
+ " exit()\n",
+ "\n",
+ "#target=input( \"Enter target file name \" ) \n",
+ "print \"Enter target file name \"\n",
+ "target = \"temp.txt\"\n",
+ "print target\n",
+ "target=\"C:/Users/Akshatha M/Desktop/\"+target\n",
+ "\n",
+ "outhandle = open ( target, \"wb\" ) #open file in write binary mode\n",
+ "if(not outhandle):\n",
+ " print \"Cannot open target file\"\n",
+ " inhandle.close() \n",
+ " exit()\n",
+ "\n",
+ "\n",
+ " \n",
+ "while ( 1 ):\n",
+ " Bytes = inhandle.read(1)\n",
+ " if not Bytes :\n",
+ " break\n",
+ " else:\n",
+ " outhandle.write(Bytes) #write into target file\n",
+ "\n",
+ "#closen files\n",
+ "inhandle.close()\n",
+ "outhandle.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter source file name \n",
+ "Employee.txt\n",
+ "Enter target file name \n",
+ "temp.txt\n"
+ ]
+ }
+ ],
+ "prompt_number": 16
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Detecting Errors in Reading/Writing, Page number: 470<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''A program that illustrates the usage of ferror( )'''\n",
+ "\n",
+ "\n",
+ "fp = open ( \"C:/Users/Akshatha/Documents/extrastuff/skills.txt\", \"w\" ) \n",
+ "while (1):\n",
+ " try:\n",
+ " ch = fp.read(1) #read character from file \n",
+ " except: #ferror()\n",
+ " print \"Error in reading file\" \n",
+ " break \n",
+ " print ch \n",
+ " \n",
+ "fp.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Error in reading file\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Standard IO devices, Page number: 472<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''A program to write a file to a printer'''\n",
+ "\n",
+ "import io\n",
+ "\n",
+ "try:\n",
+ " fp = open (\"C:/Users/Akshatha/Documents/extrastuff/skills.txt\", \"r\")\n",
+ "except:\n",
+ " print \"cannot open file\"\n",
+ " exit()\n",
+ " \n",
+ "io.open('stdprn','w') \n",
+ "try:\n",
+ " stdprn = io.open('stdprn', 'w') #open printer\n",
+ "\n",
+ " while ( 1 ):\n",
+ " ch = fp.read(1)\n",
+ " if not ch :\n",
+ " break\n",
+ " else:\n",
+ " stdprn.write(ch) #write into printer\n",
+ "except: #no printer\n",
+ " #closen files\n",
+ " fp.close()\n",
+ " stdprn.close()\n",
+ " "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [],
+ "language": "python",
+ "metadata": {},
+ "outputs": []
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file |