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diff --git a/sample_notebooks/VikasPrasad/chapter1_9.ipynb b/sample_notebooks/VikasPrasad/chapter1_9.ipynb new file mode 100755 index 00000000..b5226e07 --- /dev/null +++ b/sample_notebooks/VikasPrasad/chapter1_9.ipynb @@ -0,0 +1,170 @@ +{ + "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", + " \n", + "\t#since private instance variables don't exist in Python,\n", + " #hence using a convention: name prefixed with an underscore, 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", + " \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 create objects\n", + " #with instances customized to a specific initial state\n", + "\t\t\n", + " #since private instance variables don't exist in Python,\n", + " #hence using a convention: name prefixed with an underscore, 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", + " \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": {} + } + ] +}
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