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     "source": [
      "<h1>Chapter 13: More Issues In Input/Output<h1>"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "<h3>Using argc and argv, Page number: 467<h3>"
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     "input": [
      "\n",
      "import sys\n",
      "\n",
      "if ( len(sys.argv) != 3 ):\n",
      "    print ( \"Improper number of arguments\" )\n",
      "    exit( )\n",
      "    \n",
      "fs = open ( sys.argv[2], \"r\" ) #open file in read mode\n",
      "if ( not fs):\n",
      "    print ( \"Cannot open source file\" )\n",
      "    exit( )\n",
      "    \n",
      "ft = open ( sys.argv[2], \"w\" ) #open file in write mode\n",
      "if ( not ft ):\n",
      "    print ( \"Cannot open target file\" )\n",
      "    fs.close()\n",
      "    exit( )\n",
      "    \n",
      "while ( 1 ):\n",
      "    ch = fs.read(1)\n",
      "    if ( not ch ):\n",
      "        break\n",
      "    else:\n",
      "        ft.write(ch)\n",
      "\n",
      "#close files     \n",
      "fs.close()\n",
      "ft.close()\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Improper number of arguments\n"
       ]
      }
     ],
     "prompt_number": 1
    },
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     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
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