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  "signature": "sha256:275b458b34ae91067224e50705db107812d45fc58e5291ede57a7d2fe00a2167"
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 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Chapter 14: Advanced and Specialized Topics"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Program 14.1, page no. 592"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "import string\n",
      "import sys\n",
      "\n",
      "print \"Enter a character: \",\n",
      "ch = raw_input()\n",
      "\n",
      "if ch.isalnum():\n",
      "    if ch.isdigit():\n",
      "        print \"You entered the digit \", ch\n",
      "    elif ch.islower():\n",
      "        print \"You entered a lower case \", ch.upper()\n",
      "    elif ch.isupper():\n",
      "        print \"You entered a upper case \", ch.lower()\n",
      "    elif ch in string.punctuation:\n",
      "        print \"You entered a punctuation character \", ch\n",
      "    else:\n",
      "        print \"You entered \", ch, \"but I don't know what it is!\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter a character: "
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "g\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        " You entered a lower case  G\n"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Program 14.2, page no. 596"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "print \"Enter a string of less than 100 characters: \",\n",
      "text = raw_input()\n",
      "\n",
      "print \"Enter the string sought: \",\n",
      "sought = raw_input()\n",
      "sought = sought.lower()\n",
      "count = 0\n",
      "\n",
      "sought_len = len(sought)\n",
      "\n",
      "for i in range(len(text)):\n",
      "    substr = text[i:sought_len+i]\n",
      "    if substr == sought:\n",
      "        count += 1\n",
      "\n",
      "print \"First string entered: \", text\n",
      "print \"Second string entered: \", sought\n",
      "print \"The second string was found in first %d times\" %count\n",
      "\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter a string of less than 100 characters: "
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Smith, where Jones had had, \"had\", had had \"had had\". Enter the string sought (less than 40 characters): Had\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        " Enter the string sought: "
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "had\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        " First string entered:  Smith, where Jones had had, \"had\", had had \"had had\". Enter the string sought (less than 40 characters): Had\n",
        "Second string entered:  had\n",
        "The second string was found in first 7 times\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Program 14.3, page no. 606"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "cx = 1.0 + 3.0j\n",
      "cy = 1.0 - 4.0j\n",
      "\n",
      "sum = cx + cy\n",
      "diff = cx - cy\n",
      "product = cx * cy\n",
      "quotient = cy/cy\n",
      "conjugate = cx.conjugate()\n",
      "\n",
      "print \"Complex numbers are supported\"\n",
      "print \"Working with complex numbers: \"\n",
      "print \"Starting values: cx = %.2f%+.2fi cy = %.2f%+.2fi\" %(cx.real, cx.imag, cy.real, cy.imag)\n",
      "print \"The sum cx + cy = %.2f%+.2fi\" %(sum.real, sum.imag)\n",
      "print \"The difference cx - cy = %.2f%+.2fi\" %(diff.real, diff.imag)\n",
      "print \"The product cx * cy = %.2f%+.2fi\" %(product.real, product.imag)\n",
      "print \"The quotient cx / cy = %.2f%+.2fi\" %(quotient.real, quotient.imag)\n",
      "print \"The conjugate of cx = %.2f%+.2fi\" %(conjugate.real, conjugate.imag)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Complex numbers are supported\n",
        "Working with complex numbers: \n",
        "Starting values: cx = 1.00+3.00i cy = 1.00-4.00i\n",
        "The sum cx + cy = 2.00-1.00i\n",
        "The difference cx - cy = 0.00+7.00i\n",
        "The product cx * cy = 13.00-1.00i\n",
        "The quotient cx / cy = 1.00-0.00i\n",
        "The conjugate of cx = 1.00-3.00i\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Program 14.4, page no. 610"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "from threading import Thread\n",
      "\n",
      "def get_data(pdata):\n",
      "    pd = pdata\n",
      "    print \"The get_data thread received: data.a=%d and data.b=%d\" %(pd[0], pd[1])\n",
      "    pd[0] *= 3\n",
      "    print \"The get_data thread makes it: data.a=%d and data.b=%d \" %(pd[0], pd[1])\n",
      " \n",
      "def process_data(pdata):\n",
      "    pd = pdata\n",
      "    print \"The process_data thread received: data.a=%d and data.b=%d \"%(pd[0], pd[1])\n",
      " \n",
      "mydata = [123, 345]\n",
      "print \"Before starting the get_data thread: mydata.a=%d and mydata. b=%d\" %(mydata[0], mydata[1])\n",
      "print \"get_data thread started.\"\n",
      "t1 = Thread(target=get_data, args=(mydata,))\n",
      "t1.start()\n",
      "Thread.join(t1)\n",
      "print \"process_data thread started.\"\n",
      "t2 = Thread(target=process_data, args=(mydata,))\n",
      "t2.start()\n",
      "Thread.join(t2)\n",
      "print \"After both threads finish executing: mydata.a=%d and mydata. b=%d\" %(mydata[0], mydata[1])"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Before starting the get_data thread: mydata.a=123 and mydata. b=345\n",
        "get_data thread started.\n",
        "The get_data thread received: data.a=123 and data.b=345\n",
        "The get_data thread makes it: data.a=369 and data.b=345 \n",
        "process_data thread started.\n",
        "The process_data thread received: data.a=369 and data.b=345 \n",
        "After both threads finish executing: mydata.a=369 and mydata. b=345\n"
       ]
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Program 14.5, page no. 616"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "from threading import Thread\n",
      "import math\n",
      "import time\n",
      "\n",
      "thread_count = 5\n",
      "\n",
      "thread_id = []\n",
      "task = 0\n",
      "\n",
      "def execute_task():\n",
      "    global task\n",
      "    task += 1\n",
      "    print \"Task %d started.\" %task\n",
      "    time.sleep(1)\n",
      "    for i in range(1000000):\n",
      "        x = math.sqrt(3.1415926)\n",
      "    print \"Task %d finished\" %task\n",
      " \n",
      "\n",
      "for i in range(thread_count):\n",
      "    thread_id.append(Thread(target=execute_task))\n",
      "    thread_id[i].start()\n",
      "    \n",
      "for j in range(thread_count):\n",
      "    Thread.join(thread_id[j])"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Task 1 started.\n",
        "Task 2 started.\n",
        "Task 3 started.\n",
        "Task 4 started.\n",
        "Task 5 started.\n",
        "Task 5 finished\n",
        "Task 5 finished\n",
        "Task 5 finished\n",
        "Task 5 finished\n",
        "Task 5 finished\n"
       ]
      }
     ],
     "prompt_number": 9
    }
   ],
   "metadata": {}
  }
 ]
}