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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Chapter 22: File Operations"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example canopen.c, Page 547"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "try:\n",
      "    fname=raw_input()\n",
      "    fp=open('noexist',r)\n",
      "except:\n",
      "    print \"Can't be opened\"\n",
      "else:\n",
      "    print \"Can be opened\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "file\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Can't be opened\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example fcopy.c, Page 568"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "try:\n",
      "    s=raw_input(\"Source\")\n",
      "    d=raw_input(\"Destination\")\n",
      "    source_fp=open(s,'rb')\n",
      "    dest_fp = open(d,wb)\n",
      "\n",
      "    for line in source_fp.readlines():\n",
      "        dest_fp.write(line)   \n",
      "\n",
      "    dest_fp.close()\n",
      "    source_fp.close()\n",
      "except:\n",
      "    print \"Can't be opened\"\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Sourcef1\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Destinationf2\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Can't be opened\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example invclear.c, Page 574"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "NAME_LEN=25\n",
      "max_parts=100\n",
      "char name=None*(NAME_LEN+1)\n",
      "on_hand=list()\n",
      "try:\n",
      "    fp=open('inventory.dat','r')\n",
      "except:\n",
      "    print \"Cant open inventory file\"\n",
      "num_parts=fp.read()\n",
      "for i in range (num_parts):\n",
      "    on_hand[i]=0\n",
      "fp.seek(0,0)\n",
      "fp.write(on_hand)\n",
      "fp.close\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
 ]
}