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+{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 14: The Road Ahead: Structures and Classes"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.1, page no. 317"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "declaring structure\n",
+ "note: there is no concept of structure in python. We will use class instead\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " name = \"\"\n",
+ " height = 0"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.2, page no. 318"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "declares a three-element Person array, assigns values to the member\n",
+ "variables of each element, and then outputs their values\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " name = \"\"\n",
+ " height = 0\n",
+ "\n",
+ "MAX = 3\n",
+ "p = []\n",
+ "\n",
+ "for x in range(MAX):\n",
+ " per = Person()\n",
+ " print \"Enter person's name: \",\n",
+ " per.name = raw_input()\n",
+ " print \"Enter height in inches: \",\n",
+ " per.height = int(raw_input())\n",
+ " p.append(per)\n",
+ "\n",
+ "print \"Outputting person data\\n\";\n",
+ "print \"======================\\n\";\n",
+ "for x in range(MAX):\n",
+ " print \"Person \", x + 1, \"'s name is \", p[x].name, \" and height is \", p[x].height"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Jeff\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "50\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Kent\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "50\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Jefff\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "40\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Outputting person data\n",
+ "\n",
+ "======================\n",
+ "\n",
+ "Person 1 's name is Jeff and height is 50\n",
+ "Person 2 's name is Kent and height is 50\n",
+ "Person 3 's name is Jefff and height is 40\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.3, page no. 320"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "constructors & destructors\n",
+ "note: there are no destructors in Python\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " name = \"\"\n",
+ " height = 0\n",
+ "\n",
+ "MAX = 3\n",
+ "p1 = Person()\n",
+ "print \"The person's name is \", p1.name, \" and height is \", p1.height"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The person's name is and height is 0\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.4, page no. 322"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "constructors\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " def __init__(self):\n",
+ " self.name = \"no name assigned\"\n",
+ " self.height = -1\n",
+ "\n",
+ "MAX = 3\n",
+ "p1 = Person()\n",
+ "print \"The person's name is \", p1.name, \" and height is \", p1.height"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The person's name is no name assigned and height is -1\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.5, page no. 323"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "constructors with arguments\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " def __init__(self, s=\"no name assigned\", h=-1):\n",
+ " self.name = s\n",
+ " self.height = h\n",
+ "\n",
+ "MAX = 3\n",
+ "print \"Enter a person's name: \",\n",
+ "s = raw_input()\n",
+ "print \"Enter height in inches: \",\n",
+ "h = int(raw_input())\n",
+ "p1 = Person(s, h)\n",
+ "print \"The person's name is \", p1.name, \" and height is \", p1.height"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter a person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Jeff\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "39\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " The person's name is Jeff and height is 39\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.6, page no. 324"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "Separating the Constructor Prototype and Implementation\n",
+ "note: separation is not possible in Python we will do it the same way as previous\n",
+ "program\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " def __init__(self, s=\"no name assigned\", h=-1):\n",
+ " self.name = s\n",
+ " self.height = h\n",
+ "\n",
+ "MAX = 3\n",
+ "print \"Enter a person's name: \",\n",
+ "s = raw_input()\n",
+ "print \"Enter height in inches: \",\n",
+ "h = int(raw_input())\n",
+ "p1 = Person(s, h)\n",
+ "print \"The person's name is \", p1.name, \" and height is \", p1.height\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter a person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Jeff\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "50\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " The person's name is Jeff and height is 50\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.7, page no. 325"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "Passing Structures as Function Arguments\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " name = \"\"\n",
+ " height = \"\"\n",
+ " def setValues(self, pers):\n",
+ " print \"Enter person's name: \",\n",
+ " pers.name = raw_input()\n",
+ " print \"Enter height in inches: \",\n",
+ " pers.height = int(raw_input())\n",
+ " def getValues(self, pers):\n",
+ " print \"Person's name is \", pers.name, \" height is \", pers.height\n",
+ "\n",
+ "p1 = Person()\n",
+ "p1.setValues(p1)\n",
+ "print \"Outputting person data\"\n",
+ "print \"======================\"\n",
+ "p1.getValues(p1)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Jeff\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "60\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Outputting person data\n",
+ "======================\n",
+ "Person's name is Jeff height is 60\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.8, page no. 326"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "nesting structures\n",
+ "\"\"\"\n",
+ "\n",
+ "class Date:\n",
+ " month = 0\n",
+ " day = 0\n",
+ " year = 0\n",
+ "\n",
+ "class Person:\n",
+ " name = \"\"\n",
+ " height = 0\n",
+ " bDay = Date()\n",
+ " def setValues(self, pers):\n",
+ " print \"Enter person's name: \",\n",
+ " pers.name = raw_input()\n",
+ " print \"Enter height in inches: \",\n",
+ " pers.height = int(raw_input())\n",
+ " print \"Enter birthdate\"\n",
+ " pers.bDay.month = int(raw_input(\"Month: \"))\n",
+ " pers.bDay.day = int(raw_input(\"Day: \"))\n",
+ " pers.bDay.year = int(raw_input(\"Year: \"))\n",
+ " def getValues(self, pers):\n",
+ " print \"Person's name: \", pers.name\n",
+ " print \"Person's height\", pers.height\n",
+ " print \"Person's birthday in mm/dd/yyyy format is: \", pers.bDay.month, pers.bDay.day, pers.bDay.year\n",
+ "\n",
+ "p1 = Person()\n",
+ "p1.setValues(p1)\n",
+ "print \"Outputting person data\"\n",
+ "print \"======================\"\n",
+ "p1.getValues(p1)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Jeff\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "59\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter birthdate\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Month: 20\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Day: 05\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Year: 1999\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Outputting person data\n",
+ "======================\n",
+ "Person's name: Jeff\n",
+ "Person's height 59\n",
+ "Person's birthday in mm/dd/yyyy format is: 20 5 1999\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.9, page no. 330"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "classes\n",
+ "note: there won't be any error unlike the situation mentioned in textbook\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " name = \"\"\n",
+ " height = \"\"\n",
+ " def setValues(self, pers):\n",
+ " print \"Enter person's name: \",\n",
+ " pers.name = raw_input()\n",
+ " print \"Enter height in inches: \",\n",
+ " pers.height = int(raw_input())\n",
+ " def getValues(self, pers):\n",
+ " print \"Person's name is \", pers.name, \" height is \", pers.height\n",
+ "\n",
+ "p1 = Person()\n",
+ "p1.setValues(p1)\n",
+ "print \"Outputting person data\"\n",
+ "print \"======================\"\n",
+ "p1.getValues(p1)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "JEff\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "50\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Outputting person data\n",
+ "======================\n",
+ "Person's name is JEff height is 50\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "example 14.10, page no. 331"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\"\"\"\n",
+ "private & public specifiers\n",
+ "note: there are no such specifiers in Python\n",
+ "\"\"\"\n",
+ "\n",
+ "class Person:\n",
+ " name = \"\"\n",
+ " height = \"\"\n",
+ " def setValues(self, pers):\n",
+ " print \"Enter person's name: \",\n",
+ " pers.name = raw_input()\n",
+ " print \"Enter height in inches: \",\n",
+ " pers.height = int(raw_input())\n",
+ " def getValues(self):\n",
+ " print \"Person's name is \", self.getName(), \" height is \", self.getHeight()\n",
+ " def getName(self):\n",
+ " return self.name\n",
+ " def getHeight(self):\n",
+ " return self.height\n",
+ "\n",
+ "p1 = Person()\n",
+ "p1.setValues(p1)\n",
+ "print \"Outputting person data\"\n",
+ "print \"======================\"\n",
+ "p1.getValues()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter person's name: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Jeff\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Enter height in inches: "
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "60\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Outputting person data\n",
+ "======================\n",
+ "Person's name is Jeff height is 60\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-20 18:02:40 +0000