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+{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "1: Overview of Data Structures and Algorithms"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1: Page 20"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "class Thermostat:\n",
+ "\t\"\"\"A simple thermostat class\"\"\"\n",
+ "\t#since private instance variables don't exist in Python, hence using a convention: name prefixed with an underscore,\n",
+ "\t#to treat them as non-public part\n",
+ "\t_currentTemp = 0.0\n",
+ "\t_desiredTemp = 0.0\n",
+ "\n",
+ "\tdef furnace_on(self):\n",
+ "\t\t#method body goes here\n",
+ "\t\tpass\n",
+ "\n",
+ "\tdef furnace_off(self):\n",
+ "\t\t#method body goes here\n",
+ "\t\tpass\n",
+ "#end class Thermostat"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2: Page 22"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#demonstrates basic OOP syntax\n",
+ "\n",
+ "class BankAccount:\n",
+ "\t\"\"\"A simple bank account class\"\"\"\n",
+ "\t\n",
+ "\tdef __init__(self, openingBalance):\t#special method to cerate objects with instances customized to a specific initial state\n",
+ "\t\t#since private instance variables don't exist in Python, hence using a convention: name prefixed with an underscore,\n",
+ "\t\t#to treat them as non-public part\n",
+ "\t self._balance = openingBalance\t#account balance\n",
+ "\n",
+ "\tdef deposit(self, amount):\t#makes deposit\n",
+ "\t\tself._balance = self._balance + amount\n",
+ "\n",
+ "\tdef withdraw(self, amount):\t#makes withdrawl\n",
+ "\t\tself._balance = self._balance - amount\n",
+ "\n",
+ "\tdef display(self):\t#displays balance\n",
+ "\t\tprint 'Balance=', self._balance\n",
+ "#end class BankAccount\n",
+ "\n",
+ "ba1 = BankAccount(100.00)\t#create account\n",
+ "\n",
+ "print 'Before transactions, ',\n",
+ "ba1.display()\t#display balance\n",
+ "\n",
+ "ba1.deposit(74.35)\t#make deposit\n",
+ "ba1.withdraw(20.00)\t#make withdrawl\n",
+ "\n",
+ "print 'After transactions, ',\n",
+ "ba1.display()\t#display balance\n",
+ "#end"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Before transactions, Balance= 100.0\n",
+ "After transactions, Balance= 154.35\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3: Page 25"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#creating string objects\n",
+ "str1 = ''\n",
+ "str2 = 'George'\n",
+ "\n",
+ "#verifying results\n",
+ "print str1\n",
+ "print str2\n",
+ "\n",
+ "#naming string object\n",
+ "str3 = 'amanuensis'\n",
+ "\n",
+ "#verifying results\n",
+ "print str3\n",
+ "\n",
+ "#accessing specific characters from string using [] operator\n",
+ "ch1 = str2[3]\n",
+ "\n",
+ "#verifying results\n",
+ "print ch1\n",
+ "\n",
+ "#finding and printing number of characters in a string\n",
+ "print len(str1)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "\n",
+ "George\n",
+ "amanuensis\n",
+ "r\n",
+ "0\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+} \ No newline at end of file