Reworked snippets for opening and closing a file to use 'with open' instead of open/close

core/files.ipynb

@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:c535c4eb558966d14a178dfbd21918ecadc105f12b3c5f939ebf807d5afd1e6f"
+  "signature": "sha256:f23d7a0b01d6b36ad881c51726d1c5e72a1c2ee783560c6d984d2742ed199266"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -14,48 +14,29 @@
      "source": [
       "# Files\n",
       "\n",
-      "* Open a File for Reading\n",
       "* Read a File\n",
-      "* Write to a New File\n",
-      "* Read and write UTF-8"
+      "* Write a File\n",
+      "* Read and Write UTF-8"
      ]
     },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "## Open a File for Reading\n",
-      "\n",
-      "Open a file in read-only mode:"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "path = 'type_util.py'\n",
-      "f = open(path)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 2
-    },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
       "## Read a File\n",
       "\n",
-      "Read the entire file with readlines.  Iterate over the file lines as you would with a list.  rstrip removes the EOL markers."
+      "Open a file in read-only mode.<br\\>\n",
+      "Iterate over the file lines.  rstrip removes the EOL markers.<br\\>"
      ]
     },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "for line in f:\n",
-      "    print(line.rstrip())"
+      "old_file_path = 'type_util.py'\n",
+      "with open(old_file_path, 'r') as old_file:\n",
+      "    for line in old_file:\n",
+      "        print(line.rstrip())"
      ],
      "language": "python",
      "metadata": {},
@@ -91,30 +72,29 @@
        ]
       }
      ],
-     "prompt_number": 3
+     "prompt_number": 1
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "## Write to a New File\n",
+      "## Write to a file\n",
       "\n",
-      "Create a new file (overwriting any previous file with the same name), write text then close the file:"
+      "Create a new file overwriting any previous file with the same name, write text, then close the file:"
      ]
     },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "path = 'hello_world.txt'\n",
-      "f = open(path, 'w')\n",
-      "f.write('hello world!')\n",
-      "f.close()"
+      "new_file_path = 'hello_world.txt'\n",
+      "with open(new_file_path, 'w') as new_file:\n",
+      "    new_file.write('hello world!')"
      ],
      "language": "python",
      "metadata": {},
      "outputs": [],
-     "prompt_number": 4
+     "prompt_number": 2
     },
     {
      "cell_type": "markdown",
@@ -136,7 +116,7 @@
      "language": "python",
      "metadata": {},
      "outputs": [],
-     "prompt_number": 5
+     "prompt_number": 3
     }
    ],
    "metadata": {}