diff --git a/python-data/files.ipynb b/python-data/files.ipynb
index a690a88..1bb805a 100644
--- a/python-data/files.ipynb
+++ b/python-data/files.ipynb
@@ -1,125 +1,135 @@
 {
- "metadata": {
-  "name": "",
-  "signature": "sha256:f23d7a0b01d6b36ad881c51726d1c5e72a1c2ee783560c6d984d2742ed199266"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
+ "cells": [
   {
-   "cells": [
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Files\n",
+    "\n",
+    "* Read a File\n",
+    "* Write a File\n",
+    "* Read and Write UTF-8"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Read a File\n",
+    "\n",
+    "Open a file in read-only mode.<br\\>\n",
+    "Iterate over the file lines.  rstrip removes the EOL markers.<br\\>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
     {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "# Files\n",
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "class TypeUtil:\n",
       "\n",
-      "* Read a File\n",
-      "* Write a File\n",
-      "* Read and Write UTF-8"
-     ]
-    },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "## Read a File\n",
+      "    @classmethod\n",
+      "    def is_iterable(cls, obj):\n",
+      "        \"\"\"Determines if obj is iterable.\n",
       "\n",
-      "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": [
-      "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": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "class TypeUtil:\n",
-        "\n",
-        "    @classmethod\n",
-        "    def is_iterable(cls, obj):\n",
-        "        \"\"\"Determines if obj is iterable.\n",
-        "\n",
-        "        Useful when writing functions that can accept multiple types of\n",
-        "        input (list, tuple, ndarray, iterator).  Pairs well with\n",
-        "        convert_to_list.\n",
-        "        \"\"\"\n",
-        "        try:\n",
-        "            iter(obj)\n",
-        "            return True\n",
-        "        except TypeError:\n",
-        "            return False\n",
-        "\n",
-        "    @classmethod\n",
-        "    def convert_to_list(cls, obj):\n",
-        "        \"\"\"Converts obj to a list if it is not a list and it is iterable,\n",
-        "        else returns the original obj.\n",
-        "        \"\"\"\n",
-        "        if not isinstance(obj, list) and cls.is_iterable(obj):\n",
-        "            obj = list(obj)\n",
-        "        return obj\n"
-       ]
-      }
-     ],
-     "prompt_number": 1
-    },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "## Write to a file\n",
+      "        Useful when writing functions that can accept multiple types of\n",
+      "        input (list, tuple, ndarray, iterator).  Pairs well with\n",
+      "        convert_to_list.\n",
+      "        \"\"\"\n",
+      "        try:\n",
+      "            iter(obj)\n",
+      "            return True\n",
+      "        except TypeError:\n",
+      "            return False\n",
       "\n",
-      "Create a new file overwriting any previous file with the same name, write text, then close the file:"
+      "    @classmethod\n",
+      "    def convert_to_list(cls, obj):\n",
+      "        \"\"\"Converts obj to a list if it is not a list and it is iterable,\n",
+      "        else returns the original obj.\n",
+      "        \"\"\"\n",
+      "        if not isinstance(obj, list) and cls.is_iterable(obj):\n",
+      "            obj = list(obj)\n",
+      "        return obj\n"
      ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "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": 2
-    },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "## Read and Write UTF-8"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import codecs\n",
-      "with codecs.open(\"hello_world_new.txt\", \"a\", \"utf-8\") as new_file:\n",
-      "    with codecs.open(\"hello_world.txt\", \"r\", \"utf-8\") as old_file:                   \n",
-      "        for line in old_file:\n",
-      "            new_file.write(line + '\\n')"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 3
     }
    ],
-   "metadata": {}
+   "source": [
+    "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())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Write to a file\n",
+    "\n",
+    "Create a new file overwriting any previous file with the same name, write text, then close the file:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [],
+   "source": [
+    "new_file_path = 'hello_world.txt'\n",
+    "with open(new_file_path, 'w') as new_file:\n",
+    "    new_file.write('hello world!')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Read and Write UTF-8"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [],
+   "source": [
+    "import codecs\n",
+    "with codecs.open(\"hello_world_new.txt\", \"a\", \"utf-8\") as new_file:\n",
+    "    with codecs.open(\"hello_world.txt\", \"r\", \"utf-8\") as old_file:                   \n",
+    "        for line in old_file:\n",
+    "            new_file.write(line + '\\n')"
+   ]
   }
- ]
-}
\ No newline at end of file
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}