{ "metadata": { "name": "", "signature": "sha256:c88e4872fc4418c2962652967a7ca0a93c345eb9f3bd38488ba817f74e5fc2eb" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "CHAPTER 4: THE CASE CONTROL STRUCTURE" ] }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "EXAMPLE ON PAGE:126" ] }, { "cell_type": "code", "collapsed": false, "input": [ " \n", "i=2\n", "def switch(i):\n", " return {True: 'I am in default\\n', #default case\n", " i==1: 'I am in case1\\n',\n", " i==2: 'I am in case2\\n',\n", " i==3: 'I am in case3\\n',\n", " }[True]\n", "print switch(i)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "I am in case2\n", "\n" ] } ], "prompt_number": 1 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "EXAMPLE ON PAGE:128" ] }, { "cell_type": "code", "collapsed": false, "input": [ " \n", "i=22\n", "def switch(i):\n", " return{True: 'I am in default\\n',\n", " i==121: 'I am in case 121\\n',\n", " i==7: 'I am in case 7\\n',\n", " i==22: 'I am in case 22\\n',\n", " }[True]\n", "print switch(i)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "I am in case 22\n", "\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "EXAMPLE ON PAGE:128-129" ] }, { "cell_type": "code", "collapsed": false, "input": [ " \n", "c='x'\n", "def switch(c):\n", " return {True: 'I am in default\\n',\n", " c=='v': 'I am in case v\\n',\n", " c=='a': 'I am in case a\\n',\n", " c=='x': 'I am in case x\\n',\n", " }[True]\n", "print switch(c)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "I am in case x\n", "\n" ] } ], "prompt_number": 3 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "EXAMPLE ON PAGE:129-130" ] }, { "cell_type": "code", "collapsed": false, "input": [ " \n", "print \"Enter any one of the alphabets a,b,or c\"\n", "ch=raw_input()\n", "def casea():\n", " print \"\"\n", "def caseb():\n", " print \"\"\n", "def casec():\n", " print \"\"\n", "def switch(ch):\n", " return {True: 'wish you knew what are alphabets\\n',\n", " ch=='a' or ch=='A': 'a as in ashar\\n',\n", " ch=='b' or ch=='B': 'b as in brain\\n',\n", " ch=='c' or ch=='C': 'c as in cookie\\n',\n", " }[True]\n", "print switch(ch)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Enter any one of the alphabets a,b,or c\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "B\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "b as in brain\n", "\n" ] } ], "prompt_number": 6 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "EXAMPLE ON PAGE:130" ] }, { "cell_type": "code", "collapsed": false, "input": [ " \n", "print \"Enter value of i\"\n", "i=eval(raw_input())\n", "def switch(i):\n", " print \"Hello\\n\" #It's python,not C :)\n", " try:\n", " return {1: a,\n", " 2: b,\n", " }[i]()\n", " except:\n", " print \"wrong choice\" #print message in default case\n", "def a():\n", " j=10\n", " print j #print j as 10 if i=1\n", "def b():\n", " j=20 \n", " print j #print j as 20 if i=2\n", "switch(i)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Enter value of i\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "1\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "Hello\n", "\n", "10\n" ] } ], "prompt_number": 10 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "EXAMPLE ON PAGE:133" ] }, { "cell_type": "code", "collapsed": false, "input": [ " \n", "import sys\n", "print \"Enter the number of goals scored against india\"\n", "goals=eval(raw_input())\n", "if goals<=5:\n", " print \"To err is human!\\n\"\n", "else:\n", " print \"About time soccer players learnt C\\n\"\n", " print \"and said goodbye! adieu! to soccer\\n\"" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Enter the number of goals scored against india\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "7\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "About time soccer players learnt C\n", "\n", "and said goodbye! adieu! to soccer\n", "\n" ] } ], "prompt_number": 11 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "EXAMPLE ON PAGE:134-135" ] }, { "cell_type": "code", "collapsed": false, "input": [ " \n", "for i in range(1,4,1):\n", " for j in range(1,4,1):\n", " for k in range(1,4,1):\n", " if (i==3 and j==3 and k==3):\n", " print \"Out of the loop at last!\\n\"\n", " else:\n", " print \"%d %d %d\\n\" % (i,j,k)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "1 1 1\n", "\n", "1 1 2\n", "\n", "1 1 3\n", "\n", "1 2 1\n", "\n", "1 2 2\n", "\n", "1 2 3\n", "\n", "1 3 1\n", "\n", "1 3 2\n", "\n", "1 3 3\n", "\n", "2 1 1\n", "\n", "2 1 2\n", "\n", "2 1 3\n", "\n", "2 2 1\n", "\n", "2 2 2\n", "\n", "2 2 3\n", "\n", "2 3 1\n", "\n", "2 3 2\n", "\n", "2 3 3\n", "\n", "3 1 1\n", "\n", "3 1 2\n", "\n", "3 1 3\n", "\n", "3 2 1\n", "\n", "3 2 2\n", "\n", "3 2 3\n", "\n", "3 3 1\n", "\n", "3 3 2\n", "\n", "Out of the loop at last!\n", "\n" ] } ], "prompt_number": 12 } ], "metadata": {} } ] }