From: Jon Speicher <jon.speicher@gmail.com>
Date: Sun, 28 Jul 2013 00:26:33 +0000 (-0400)
Subject: Clear results in base notebook
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=17bb08521fc0c025d239615fffaaad35276cfd47;p=swc-testing-nose.git

Clear results in base notebook
---

diff --git a/python/sw_engineering/SoftwareEngineering.ipynb b/python/sw_engineering/SoftwareEngineering.ipynb
index b2ca6ef..c587377 100644
--- a/python/sw_engineering/SoftwareEngineering.ipynb
+++ b/python/sw_engineering/SoftwareEngineering.ipynb
@@ -117,8 +117,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 4
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -135,16 +134,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "pyout",
-       "prompt_number": 5,
-       "text": [
-        "117"
-       ]
-      }
-     ],
-     "prompt_number": 5
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -196,20 +186,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "2011-04-22 21:06 Grizzly 36\r\n",
-        "2011-04-23 14:12 Elk 25\r\n",
-        "2011-04-23 10:24 Elk 26\r\n",
-        "2011-04-23 20:08 Wolverine 31\r\n",
-        "2011-04-23 18:46 Muskox 20\r\n"
-       ]
-      }
-     ],
-     "prompt_number": 6
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -260,8 +237,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 7
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -278,20 +254,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "2011-04-22 21:06 Grizzly 36\r\n",
-        "2011-04-23 14:12 Elk 25\r\n",
-        "2011-04-23 10:24 Elk 26\r\n",
-        "2011-04-23 20:08 Wolverine 31\r\n",
-        "2011-04-23 18:46 Muskox 20\r\n"
-       ]
-      }
-     ],
-     "prompt_number": 8
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -301,19 +264,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "pyout",
-       "prompt_number": 9,
-       "text": [
-        "(['2011-04-22', '2011-04-23', '2011-04-23', '2011-04-23', '2011-04-23'],\n",
-        " ['21:06', '14:12', '10:24', '20:08', '18:46'],\n",
-        " ['Grizzly', 'Elk', 'Elk', 'Wolverine', 'Muskox'],\n",
-        " [36, 25, 26, 31, 20])"
-       ]
-      }
-     ],
-     "prompt_number": 9
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -345,8 +296,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 10
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -363,16 +313,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "pyout",
-       "prompt_number": 11,
-       "text": [
-        "117"
-       ]
-      }
-     ],
-     "prompt_number": 11
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -418,16 +359,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Looks good!\n"
-       ]
-      }
-     ],
-     "prompt_number": 12
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -455,8 +387,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 13
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -480,8 +411,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 14
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -504,20 +434,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "ename": "AssertionError",
-       "evalue": "2 + 2 didn't equal 4",
-       "output_type": "pyerr",
-       "traceback": [
-        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mAssertionError\u001b[0m                            Traceback (most recent call last)",
-        "\u001b[0;32m<ipython-input-15-2d797333ff4c>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[1;32m      5\u001b[0m     \u001b[0;32massert\u001b[0m \u001b[0;36m4\u001b[0m \u001b[0;34m==\u001b[0m \u001b[0madd_two_plus_two\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"2 + 2 didn't equal 4\"\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      6\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 7\u001b[0;31m \u001b[0mtest_add_two_plus_two_equals_four\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-        "\u001b[0;32m<ipython-input-15-2d797333ff4c>\u001b[0m in \u001b[0;36mtest_add_two_plus_two_equals_four\u001b[0;34m()\u001b[0m\n\u001b[1;32m      3\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      4\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mtest_add_two_plus_two_equals_four\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 5\u001b[0;31m     \u001b[0;32massert\u001b[0m \u001b[0;36m4\u001b[0m \u001b[0;34m==\u001b[0m \u001b[0madd_two_plus_two\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"2 + 2 didn't equal 4\"\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      6\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      7\u001b[0m \u001b[0mtest_add_two_plus_two_equals_four\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-        "\u001b[0;31mAssertionError\u001b[0m: 2 + 2 didn't equal 4"
-       ]
-      }
-     ],
-     "prompt_number": 15
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -622,8 +539,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 16
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -633,228 +549,7 @@
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      "language": "python",
      "metadata": {},
-     "outputs": [
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-        "<div id=\"ipython_nose_5e87717b84c447ad93143bde900e1715\"></div>"
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-       "output_type": "display_data"
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-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
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-       ],
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-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5e87717b84c447ad93143bde900e1715.append($(\"<span>E</span>\"));"
-       ],
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-      {
-       "javascript": [
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-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "delete document.ipython_nose_5e87717b84c447ad93143bde900e1715;"
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-        "    \n",
-        "    <script>\n",
-        "        setTimeout(function () {\n",
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-        "                function () {\n",
-        "                    $(\n",
-        "                        $(this)\n",
-        "                            .parent().toggleClass('expanded')\n",
-        "                            .parent()\n",
-        "                            .children()\n",
-        "                            .filter('.nosetraceback')\n",
-        "                    ).toggle();\n",
-        "                }\n",
-        "            );},\n",
-        "            0);\n",
-        "    </script>\n",
-        "    \n",
-        "    <div class=\"noseresults\">\n",
-        "      <div class=\"nosebar fail leftmost\" style=\"width: 66%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar skip\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar pass rightmost\" style=\"width: 34%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      1/3 tests passed; 2 failed\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_empty_function_raises_value_error</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"&lt;<a href=\"#ipython-input-2-bc417f346267\">ipython-input-2-bc417f346267</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([2])\")\n",
-        "                .attr(\"id\", \"ipython-input-2-bc417f346267\");\n",
-        "            </script>&gt;\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "NameError: global name 'mean' is not defined\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_add_two_plus_two_equals_four</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"&lt;<a href=\"#ipython-input-15-2d797333ff4c\">ipython-input-15-2d797333ff4c</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([15])\")\n",
-        "                .attr(\"id\", \"ipython-input-15-2d797333ff4c\");\n",
-        "            </script>&gt;\", line 5, in test_add_two_plus_two_equals_four\n",
-        "    assert 4 == add_two_plus_two(), \"2 + 2 didn't equal 4\"\n",
-        "AssertionError: 2 + 2 didn't equal 4\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 18,
-       "text": [
-        "1/3 tests passed; 2 failed\n",
-        "========\n",
-        "__main__.test_mean_of_empty_function_raises_value_error\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"<ipython-input-2-bc417f346267>\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "NameError: global name 'mean' is not defined\n",
-        "\n",
-        "========\n",
-        "__main__.test_add_two_plus_two_equals_four\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"<ipython-input-15-2d797333ff4c>\", line 5, in test_add_two_plus_two_equals_four\n",
-        "    assert 4 == add_two_plus_two(), \"2 + 2 didn't equal 4\"\n",
-        "AssertionError: 2 + 2 didn't equal 4\n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 18
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -871,20 +566,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "........\r\n",
-        "----------------------------------------------------------------------\r\n",
-        "Ran 8 tests in 0.004s\r\n",
-        "\r\n",
-        "OK\r\n"
-       ]
-      }
-     ],
-     "prompt_number": 19
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -912,8 +594,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 20
+     "outputs": []
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     {
      "cell_type": "code",
@@ -923,197 +604,7 @@
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-        "            background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%);\n",
-        "            /* Chrome,Safari4+ */\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#ff3019),\n",
-        "                                         color-stop(100%,#cf0404));\n",
-        "            /* Chrome10+,Safari5.1+ */\n",
-        "            background: -webkit-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* Opera 11.10+ */\n",
-        "            background: -o-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* IE10+ */\n",
-        "            background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* W3C */\n",
-        "            background: linear-gradient(to bottom, #ff3019 0%,#cf0404 100%);\n",
-        "        }\n",
-        "        div.nosebar.pass {\n",
-        "            background: #52b152;\n",
-        "            background: -moz-linear-gradient(top, #52b152 1%, #008a00 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(1%,#52b152),\n",
-        "                                         color-stop(100%,#008a00));\n",
-        "            background: -webkit-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -o-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -ms-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: linear-gradient(to bottom, #52b152 1%,#008a00 100%);\n",
-        "        }\n",
-        "        div.nosebar.skip {\n",
-        "            background: #f1e767;\n",
-        "            background: -moz-linear-gradient(top, #f1e767 0%, #feb645 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#f1e767),\n",
-        "                                         color-stop(100%,#feb645));\n",
-        "            background: -webkit-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -o-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -ms-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: linear-gradient(to bottom, #f1e767 0%,#feb645 100%);\n",
-        "        }\n",
-        "        div.nosebar.leftmost {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "        }\n",
-        "        div.nosebar.rightmost {\n",
-        "            border-radius: 0 4px 4px 0;\n",
-        "        }\n",
-        "        div.nosefailbanner {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
-        "            margin-top: 1ex;\n",
-        "            margin-bottom: 0px;\n",
-        "        }\n",
-        "        div.nosefailbanner.expanded {\n",
-        "            border-radius: 4px 4px 0 0;\n",
-        "            border-top: 10px solid #cf0404;\n",
-        "        }\n",
-        "        pre.nosetraceback {\n",
-        "            border-radius: 0 4px 4px 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 1em;\n",
-        "            margin-left: 0px;\n",
-        "            margin-top: 0px;\n",
-        "            display: none;\n",
-        "        }\n",
-        "    </style>\n",
-        "    \n",
-        "    <script>\n",
-        "        setTimeout(function () {\n",
-        "            $('.nosefailtoggle').bind(\n",
-        "                'click',\n",
-        "                function () {\n",
-        "                    $(\n",
-        "                        $(this)\n",
-        "                            .parent().toggleClass('expanded')\n",
-        "                            .parent()\n",
-        "                            .children()\n",
-        "                            .filter('.nosetraceback')\n",
-        "                    ).toggle();\n",
-        "                }\n",
-        "            );},\n",
-        "            0);\n",
-        "    </script>\n",
-        "    \n",
-        "    <div class=\"noseresults\">\n",
-        "      <div class=\"nosebar fail leftmost\" style=\"width: 33%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar skip\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar pass rightmost\" style=\"width: 67%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      2/3 tests passed; 1 failed\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_empty_function_raises_value_error</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"&lt;<a href=\"#ipython-input-2-bc417f346267\">ipython-input-2-bc417f346267</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([2])\")\n",
-        "                .attr(\"id\", \"ipython-input-2-bc417f346267\");\n",
-        "            </script>&gt;\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "NameError: global name 'mean' is not defined\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 21,
-       "text": [
-        "2/3 tests passed; 1 failed\n",
-        "========\n",
-        "__main__.test_mean_of_empty_function_raises_value_error\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"<ipython-input-2-bc417f346267>\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "NameError: global name 'mean' is not defined\n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 21
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -1153,8 +644,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 22
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -1175,234 +665,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "html": [
-        "<div id=\"ipython_nose_880d0b5c63014ac78937ccad69cf89d2\"></div>"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_880d0b5c63014ac78937ccad69cf89d2 = $(\"#ipython_nose_880d0b5c63014ac78937ccad69cf89d2\");"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_880d0b5c63014ac78937ccad69cf89d2.append($(\"<span>E</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_880d0b5c63014ac78937ccad69cf89d2.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_880d0b5c63014ac78937ccad69cf89d2.append($(\"<span>E</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_880d0b5c63014ac78937ccad69cf89d2.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "delete document.ipython_nose_880d0b5c63014ac78937ccad69cf89d2;"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "html": [
-        "    <style type=\"text/css\">\n",
-        "        span.nosefailedfunc {\n",
-        "            font-family: monospace;\n",
-        "            font-weight: bold;\n",
-        "        }\n",
-        "        div.noseresults {\n",
-        "            width: 100%;\n",
-        "        }\n",
-        "        div.nosebar {\n",
-        "            float: left;\n",
-        "            padding: 1ex 0px 1ex 0px;\n",
-        "        }\n",
-        "        div.nosebar.fail {\n",
-        "            background: #ff3019; /* Old browsers */\n",
-        "            /* FF3.6+ */\n",
-        "            background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%);\n",
-        "            /* Chrome,Safari4+ */\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#ff3019),\n",
-        "                                         color-stop(100%,#cf0404));\n",
-        "            /* Chrome10+,Safari5.1+ */\n",
-        "            background: -webkit-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* Opera 11.10+ */\n",
-        "            background: -o-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* IE10+ */\n",
-        "            background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* W3C */\n",
-        "            background: linear-gradient(to bottom, #ff3019 0%,#cf0404 100%);\n",
-        "        }\n",
-        "        div.nosebar.pass {\n",
-        "            background: #52b152;\n",
-        "            background: -moz-linear-gradient(top, #52b152 1%, #008a00 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(1%,#52b152),\n",
-        "                                         color-stop(100%,#008a00));\n",
-        "            background: -webkit-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -o-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -ms-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: linear-gradient(to bottom, #52b152 1%,#008a00 100%);\n",
-        "        }\n",
-        "        div.nosebar.skip {\n",
-        "            background: #f1e767;\n",
-        "            background: -moz-linear-gradient(top, #f1e767 0%, #feb645 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#f1e767),\n",
-        "                                         color-stop(100%,#feb645));\n",
-        "            background: -webkit-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -o-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -ms-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: linear-gradient(to bottom, #f1e767 0%,#feb645 100%);\n",
-        "        }\n",
-        "        div.nosebar.leftmost {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "        }\n",
-        "        div.nosebar.rightmost {\n",
-        "            border-radius: 0 4px 4px 0;\n",
-        "        }\n",
-        "        div.nosefailbanner {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
-        "            margin-top: 1ex;\n",
-        "            margin-bottom: 0px;\n",
-        "        }\n",
-        "        div.nosefailbanner.expanded {\n",
-        "            border-radius: 4px 4px 0 0;\n",
-        "            border-top: 10px solid #cf0404;\n",
-        "        }\n",
-        "        pre.nosetraceback {\n",
-        "            border-radius: 0 4px 4px 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 1em;\n",
-        "            margin-left: 0px;\n",
-        "            margin-top: 0px;\n",
-        "            display: none;\n",
-        "        }\n",
-        "    </style>\n",
-        "    \n",
-        "    <script>\n",
-        "        setTimeout(function () {\n",
-        "            $('.nosefailtoggle').bind(\n",
-        "                'click',\n",
-        "                function () {\n",
-        "                    $(\n",
-        "                        $(this)\n",
-        "                            .parent().toggleClass('expanded')\n",
-        "                            .parent()\n",
-        "                            .children()\n",
-        "                            .filter('.nosetraceback')\n",
-        "                    ).toggle();\n",
-        "                }\n",
-        "            );},\n",
-        "            0);\n",
-        "    </script>\n",
-        "    \n",
-        "    <div class=\"noseresults\">\n",
-        "      <div class=\"nosebar fail leftmost\" style=\"width: 50%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar skip\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar pass rightmost\" style=\"width: 50%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      2/4 tests passed; 2 failed\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_zero_is_zero</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"&lt;<a href=\"#ipython-input-22-ee2ab148c1b0\">ipython-input-22-ee2ab148c1b0</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([22])\")\n",
-        "                .attr(\"id\", \"ipython-input-22-ee2ab148c1b0\");\n",
-        "            </script>&gt;\", line 2, in test_mean_of_zero_is_zero\n",
-        "    assert 0 == mean([0])\n",
-        "NameError: global name 'mean' is not defined\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_empty_function_raises_value_error</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"&lt;<a href=\"#ipython-input-2-bc417f346267\">ipython-input-2-bc417f346267</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([2])\")\n",
-        "                .attr(\"id\", \"ipython-input-2-bc417f346267\");\n",
-        "            </script>&gt;\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "NameError: global name 'mean' is not defined\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 23,
-       "text": [
-        "2/4 tests passed; 2 failed\n",
-        "========\n",
-        "__main__.test_mean_of_zero_is_zero\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"<ipython-input-22-ee2ab148c1b0>\", line 2, in test_mean_of_zero_is_zero\n",
-        "    assert 0 == mean([0])\n",
-        "NameError: global name 'mean' is not defined\n",
-        "\n",
-        "========\n",
-        "__main__.test_mean_of_empty_function_raises_value_error\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"<ipython-input-2-bc417f346267>\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "NameError: global name 'mean' is not defined\n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 23
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -1413,8 +676,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 24
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -1424,234 +686,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "html": [
-        "<div id=\"ipython_nose_c2735c7e3d0c4677b88a8a5cd4cdf4a9\"></div>"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_c2735c7e3d0c4677b88a8a5cd4cdf4a9 = $(\"#ipython_nose_c2735c7e3d0c4677b88a8a5cd4cdf4a9\");"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_c2735c7e3d0c4677b88a8a5cd4cdf4a9.append($(\"<span>E</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_c2735c7e3d0c4677b88a8a5cd4cdf4a9.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_c2735c7e3d0c4677b88a8a5cd4cdf4a9.append($(\"<span>E</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_c2735c7e3d0c4677b88a8a5cd4cdf4a9.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "delete document.ipython_nose_c2735c7e3d0c4677b88a8a5cd4cdf4a9;"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "html": [
-        "    <style type=\"text/css\">\n",
-        "        span.nosefailedfunc {\n",
-        "            font-family: monospace;\n",
-        "            font-weight: bold;\n",
-        "        }\n",
-        "        div.noseresults {\n",
-        "            width: 100%;\n",
-        "        }\n",
-        "        div.nosebar {\n",
-        "            float: left;\n",
-        "            padding: 1ex 0px 1ex 0px;\n",
-        "        }\n",
-        "        div.nosebar.fail {\n",
-        "            background: #ff3019; /* Old browsers */\n",
-        "            /* FF3.6+ */\n",
-        "            background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%);\n",
-        "            /* Chrome,Safari4+ */\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#ff3019),\n",
-        "                                         color-stop(100%,#cf0404));\n",
-        "            /* Chrome10+,Safari5.1+ */\n",
-        "            background: -webkit-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* Opera 11.10+ */\n",
-        "            background: -o-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* IE10+ */\n",
-        "            background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* W3C */\n",
-        "            background: linear-gradient(to bottom, #ff3019 0%,#cf0404 100%);\n",
-        "        }\n",
-        "        div.nosebar.pass {\n",
-        "            background: #52b152;\n",
-        "            background: -moz-linear-gradient(top, #52b152 1%, #008a00 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(1%,#52b152),\n",
-        "                                         color-stop(100%,#008a00));\n",
-        "            background: -webkit-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -o-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -ms-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: linear-gradient(to bottom, #52b152 1%,#008a00 100%);\n",
-        "        }\n",
-        "        div.nosebar.skip {\n",
-        "            background: #f1e767;\n",
-        "            background: -moz-linear-gradient(top, #f1e767 0%, #feb645 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#f1e767),\n",
-        "                                         color-stop(100%,#feb645));\n",
-        "            background: -webkit-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -o-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -ms-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: linear-gradient(to bottom, #f1e767 0%,#feb645 100%);\n",
-        "        }\n",
-        "        div.nosebar.leftmost {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "        }\n",
-        "        div.nosebar.rightmost {\n",
-        "            border-radius: 0 4px 4px 0;\n",
-        "        }\n",
-        "        div.nosefailbanner {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
-        "            margin-top: 1ex;\n",
-        "            margin-bottom: 0px;\n",
-        "        }\n",
-        "        div.nosefailbanner.expanded {\n",
-        "            border-radius: 4px 4px 0 0;\n",
-        "            border-top: 10px solid #cf0404;\n",
-        "        }\n",
-        "        pre.nosetraceback {\n",
-        "            border-radius: 0 4px 4px 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 1em;\n",
-        "            margin-left: 0px;\n",
-        "            margin-top: 0px;\n",
-        "            display: none;\n",
-        "        }\n",
-        "    </style>\n",
-        "    \n",
-        "    <script>\n",
-        "        setTimeout(function () {\n",
-        "            $('.nosefailtoggle').bind(\n",
-        "                'click',\n",
-        "                function () {\n",
-        "                    $(\n",
-        "                        $(this)\n",
-        "                            .parent().toggleClass('expanded')\n",
-        "                            .parent()\n",
-        "                            .children()\n",
-        "                            .filter('.nosetraceback')\n",
-        "                    ).toggle();\n",
-        "                }\n",
-        "            );},\n",
-        "            0);\n",
-        "    </script>\n",
-        "    \n",
-        "    <div class=\"noseresults\">\n",
-        "      <div class=\"nosebar fail leftmost\" style=\"width: 50%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar skip\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar pass rightmost\" style=\"width: 50%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      2/4 tests passed; 2 failed\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_zero_is_zero</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"&lt;<a href=\"#ipython-input-22-ee2ab148c1b0\">ipython-input-22-ee2ab148c1b0</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([22])\")\n",
-        "                .attr(\"id\", \"ipython-input-22-ee2ab148c1b0\");\n",
-        "            </script>&gt;\", line 2, in test_mean_of_zero_is_zero\n",
-        "    assert 0 == mean([0])\n",
-        "TypeError: mean() takes no arguments (1 given)\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_empty_function_raises_value_error</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"&lt;<a href=\"#ipython-input-2-bc417f346267\">ipython-input-2-bc417f346267</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([2])\")\n",
-        "                .attr(\"id\", \"ipython-input-2-bc417f346267\");\n",
-        "            </script>&gt;\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "TypeError: mean() takes no arguments (1 given)\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 25,
-       "text": [
-        "2/4 tests passed; 2 failed\n",
-        "========\n",
-        "__main__.test_mean_of_zero_is_zero\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"<ipython-input-22-ee2ab148c1b0>\", line 2, in test_mean_of_zero_is_zero\n",
-        "    assert 0 == mean([0])\n",
-        "TypeError: mean() takes no arguments (1 given)\n",
-        "\n",
-        "========\n",
-        "__main__.test_mean_of_empty_function_raises_value_error\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"<ipython-input-2-bc417f346267>\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "TypeError: mean() takes no arguments (1 given)\n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 25
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -1662,8 +697,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 26
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -1673,227 +707,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "html": [
-        "<div id=\"ipython_nose_1e1bd17442294222a80f6cc462ac3176\"></div>"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_1e1bd17442294222a80f6cc462ac3176 = $(\"#ipython_nose_1e1bd17442294222a80f6cc462ac3176\");"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_1e1bd17442294222a80f6cc462ac3176.append($(\"<span>F</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_1e1bd17442294222a80f6cc462ac3176.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_1e1bd17442294222a80f6cc462ac3176.append($(\"<span>F</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_1e1bd17442294222a80f6cc462ac3176.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "delete document.ipython_nose_1e1bd17442294222a80f6cc462ac3176;"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "html": [
-        "    <style type=\"text/css\">\n",
-        "        span.nosefailedfunc {\n",
-        "            font-family: monospace;\n",
-        "            font-weight: bold;\n",
-        "        }\n",
-        "        div.noseresults {\n",
-        "            width: 100%;\n",
-        "        }\n",
-        "        div.nosebar {\n",
-        "            float: left;\n",
-        "            padding: 1ex 0px 1ex 0px;\n",
-        "        }\n",
-        "        div.nosebar.fail {\n",
-        "            background: #ff3019; /* Old browsers */\n",
-        "            /* FF3.6+ */\n",
-        "            background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%);\n",
-        "            /* Chrome,Safari4+ */\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#ff3019),\n",
-        "                                         color-stop(100%,#cf0404));\n",
-        "            /* Chrome10+,Safari5.1+ */\n",
-        "            background: -webkit-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* Opera 11.10+ */\n",
-        "            background: -o-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* IE10+ */\n",
-        "            background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* W3C */\n",
-        "            background: linear-gradient(to bottom, #ff3019 0%,#cf0404 100%);\n",
-        "        }\n",
-        "        div.nosebar.pass {\n",
-        "            background: #52b152;\n",
-        "            background: -moz-linear-gradient(top, #52b152 1%, #008a00 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(1%,#52b152),\n",
-        "                                         color-stop(100%,#008a00));\n",
-        "            background: -webkit-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -o-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -ms-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: linear-gradient(to bottom, #52b152 1%,#008a00 100%);\n",
-        "        }\n",
-        "        div.nosebar.skip {\n",
-        "            background: #f1e767;\n",
-        "            background: -moz-linear-gradient(top, #f1e767 0%, #feb645 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#f1e767),\n",
-        "                                         color-stop(100%,#feb645));\n",
-        "            background: -webkit-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -o-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -ms-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: linear-gradient(to bottom, #f1e767 0%,#feb645 100%);\n",
-        "        }\n",
-        "        div.nosebar.leftmost {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "        }\n",
-        "        div.nosebar.rightmost {\n",
-        "            border-radius: 0 4px 4px 0;\n",
-        "        }\n",
-        "        div.nosefailbanner {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
-        "            margin-top: 1ex;\n",
-        "            margin-bottom: 0px;\n",
-        "        }\n",
-        "        div.nosefailbanner.expanded {\n",
-        "            border-radius: 4px 4px 0 0;\n",
-        "            border-top: 10px solid #cf0404;\n",
-        "        }\n",
-        "        pre.nosetraceback {\n",
-        "            border-radius: 0 4px 4px 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 1em;\n",
-        "            margin-left: 0px;\n",
-        "            margin-top: 0px;\n",
-        "            display: none;\n",
-        "        }\n",
-        "    </style>\n",
-        "    \n",
-        "    <script>\n",
-        "        setTimeout(function () {\n",
-        "            $('.nosefailtoggle').bind(\n",
-        "                'click',\n",
-        "                function () {\n",
-        "                    $(\n",
-        "                        $(this)\n",
-        "                            .parent().toggleClass('expanded')\n",
-        "                            .parent()\n",
-        "                            .children()\n",
-        "                            .filter('.nosetraceback')\n",
-        "                    ).toggle();\n",
-        "                }\n",
-        "            );},\n",
-        "            0);\n",
-        "    </script>\n",
-        "    \n",
-        "    <div class=\"noseresults\">\n",
-        "      <div class=\"nosebar fail leftmost\" style=\"width: 50%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar skip\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar pass rightmost\" style=\"width: 50%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      2/4 tests passed; 2 failed\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_zero_is_zero</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"&lt;<a href=\"#ipython-input-22-ee2ab148c1b0\">ipython-input-22-ee2ab148c1b0</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([22])\")\n",
-        "                .attr(\"id\", \"ipython-input-22-ee2ab148c1b0\");\n",
-        "            </script>&gt;\", line 2, in test_mean_of_zero_is_zero\n",
-        "    assert 0 == mean([0])\n",
-        "AssertionError\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_empty_function_raises_value_error</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 67, in newfunc\n",
-        "    raise AssertionError(message)\n",
-        "AssertionError: test_mean_of_empty_function_raises_value_error() did not raise ValueError\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 27,
-       "text": [
-        "2/4 tests passed; 2 failed\n",
-        "========\n",
-        "__main__.test_mean_of_zero_is_zero\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"<ipython-input-22-ee2ab148c1b0>\", line 2, in test_mean_of_zero_is_zero\n",
-        "    assert 0 == mean([0])\n",
-        "AssertionError\n",
-        "\n",
-        "========\n",
-        "__main__.test_mean_of_empty_function_raises_value_error\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 67, in newfunc\n",
-        "    raise AssertionError(message)\n",
-        "AssertionError: test_mean_of_empty_function_raises_value_error() did not raise ValueError\n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 27
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -1904,8 +718,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 28
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -1915,196 +728,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "html": [
-        "<div id=\"ipython_nose_fe9e7f6480d54f919bfa6edad2ce0493\"></div>"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_fe9e7f6480d54f919bfa6edad2ce0493 = $(\"#ipython_nose_fe9e7f6480d54f919bfa6edad2ce0493\");"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_fe9e7f6480d54f919bfa6edad2ce0493.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_fe9e7f6480d54f919bfa6edad2ce0493.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_fe9e7f6480d54f919bfa6edad2ce0493.append($(\"<span>F</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_fe9e7f6480d54f919bfa6edad2ce0493.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "delete document.ipython_nose_fe9e7f6480d54f919bfa6edad2ce0493;"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "html": [
-        "    <style type=\"text/css\">\n",
-        "        span.nosefailedfunc {\n",
-        "            font-family: monospace;\n",
-        "            font-weight: bold;\n",
-        "        }\n",
-        "        div.noseresults {\n",
-        "            width: 100%;\n",
-        "        }\n",
-        "        div.nosebar {\n",
-        "            float: left;\n",
-        "            padding: 1ex 0px 1ex 0px;\n",
-        "        }\n",
-        "        div.nosebar.fail {\n",
-        "            background: #ff3019; /* Old browsers */\n",
-        "            /* FF3.6+ */\n",
-        "            background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%);\n",
-        "            /* Chrome,Safari4+ */\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#ff3019),\n",
-        "                                         color-stop(100%,#cf0404));\n",
-        "            /* Chrome10+,Safari5.1+ */\n",
-        "            background: -webkit-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* Opera 11.10+ */\n",
-        "            background: -o-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* IE10+ */\n",
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-        "        div.nosebar.rightmost {\n",
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-        "        div.nosefailbanner {\n",
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-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
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-        "            $('.nosefailtoggle').bind(\n",
-        "                'click',\n",
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-        "            0);\n",
-        "    </script>\n",
-        "    \n",
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-        "      <div class=\"nosebar fail leftmost\" style=\"width: 25%\">\n",
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-        "      <div class=\"nosebar pass rightmost\" style=\"width: 75%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      3/4 tests passed; 1 failed\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_empty_function_raises_value_error</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 67, in newfunc\n",
-        "    raise AssertionError(message)\n",
-        "AssertionError: test_mean_of_empty_function_raises_value_error() did not raise ValueError\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 29,
-       "text": [
-        "3/4 tests passed; 1 failed\n",
-        "========\n",
-        "__main__.test_mean_of_empty_function_raises_value_error\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 67, in newfunc\n",
-        "    raise AssertionError(message)\n",
-        "AssertionError: test_mean_of_empty_function_raises_value_error() did not raise ValueError\n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 29
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -2160,8 +784,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 30
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -2178,16 +801,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "pyout",
-       "prompt_number": 31,
-       "text": [
-        "0.0"
-       ]
-      }
-     ],
-     "prompt_number": 31
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2197,16 +811,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "pyout",
-       "prompt_number": 32,
-       "text": [
-        "1.0"
-       ]
-      }
-     ],
-     "prompt_number": 32
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2216,16 +821,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "pyout",
-       "prompt_number": 33,
-       "text": [
-        "3.0"
-       ]
-      }
-     ],
-     "prompt_number": 33
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2235,16 +831,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "pyout",
-       "prompt_number": 34,
-       "text": [
-        "4.566666666666666"
-       ]
-      }
-     ],
-     "prompt_number": 34
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2254,20 +841,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "ename": "ZeroDivisionError",
-       "evalue": "float division by zero",
-       "output_type": "pyerr",
-       "traceback": [
-        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mZeroDivisionError\u001b[0m                         Traceback (most recent call last)",
-        "\u001b[0;32m<ipython-input-35-e9e2222d800d>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mmean\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-        "\u001b[0;32m<ipython-input-30-16ccb79ef6d8>\u001b[0m in \u001b[0;36mmean\u001b[0;34m(numbers)\u001b[0m\n\u001b[1;32m      4\u001b[0m     \u001b[0;32mfor\u001b[0m \u001b[0mnumber\u001b[0m \u001b[0;32min\u001b[0m \u001b[0mnumbers\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      5\u001b[0m         \u001b[0mtotal\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mtotal\u001b[0m \u001b[0;34m+\u001b[0m \u001b[0mnumber\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 6\u001b[0;31m     \u001b[0;32mreturn\u001b[0m \u001b[0mtotal\u001b[0m\u001b[0;34m/\u001b[0m\u001b[0mfloat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mlen\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mnumbers\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-        "\u001b[0;31mZeroDivisionError\u001b[0m: float division by zero"
-       ]
-      }
-     ],
-     "prompt_number": 35
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -2294,8 +868,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 36
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2305,210 +878,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "html": [
-        "<div id=\"ipython_nose_5ceb566dc2db4a1cbddaa43327f83fab\"></div>"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5ceb566dc2db4a1cbddaa43327f83fab = $(\"#ipython_nose_5ceb566dc2db4a1cbddaa43327f83fab\");"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5ceb566dc2db4a1cbddaa43327f83fab.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5ceb566dc2db4a1cbddaa43327f83fab.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5ceb566dc2db4a1cbddaa43327f83fab.append($(\"<span>E</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5ceb566dc2db4a1cbddaa43327f83fab.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "delete document.ipython_nose_5ceb566dc2db4a1cbddaa43327f83fab;"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "html": [
-        "    <style type=\"text/css\">\n",
-        "        span.nosefailedfunc {\n",
-        "            font-family: monospace;\n",
-        "            font-weight: bold;\n",
-        "        }\n",
-        "        div.noseresults {\n",
-        "            width: 100%;\n",
-        "        }\n",
-        "        div.nosebar {\n",
-        "            float: left;\n",
-        "            padding: 1ex 0px 1ex 0px;\n",
-        "        }\n",
-        "        div.nosebar.fail {\n",
-        "            background: #ff3019; /* Old browsers */\n",
-        "            /* FF3.6+ */\n",
-        "            background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%);\n",
-        "            /* Chrome,Safari4+ */\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#ff3019),\n",
-        "                                         color-stop(100%,#cf0404));\n",
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-        "            /* Opera 11.10+ */\n",
-        "            background: -o-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* IE10+ */\n",
-        "            background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* W3C */\n",
-        "            background: linear-gradient(to bottom, #ff3019 0%,#cf0404 100%);\n",
-        "        }\n",
-        "        div.nosebar.pass {\n",
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-        "            background: -moz-linear-gradient(top, #52b152 1%, #008a00 100%);\n",
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-        "            border-radius: 4px 0 0 4px;\n",
-        "        }\n",
-        "        div.nosebar.rightmost {\n",
-        "            border-radius: 0 4px 4px 0;\n",
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-        "        div.nosefailbanner {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
-        "            margin-top: 1ex;\n",
-        "            margin-bottom: 0px;\n",
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-        "        div.nosefailbanner.expanded {\n",
-        "            border-radius: 4px 4px 0 0;\n",
-        "            border-top: 10px solid #cf0404;\n",
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-        "        pre.nosetraceback {\n",
-        "            border-radius: 0 4px 4px 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 1em;\n",
-        "            margin-left: 0px;\n",
-        "            margin-top: 0px;\n",
-        "            display: none;\n",
-        "        }\n",
-        "    </style>\n",
-        "    \n",
-        "    <script>\n",
-        "        setTimeout(function () {\n",
-        "            $('.nosefailtoggle').bind(\n",
-        "                'click',\n",
-        "                function () {\n",
-        "                    $(\n",
-        "                        $(this)\n",
-        "                            .parent().toggleClass('expanded')\n",
-        "                            .parent()\n",
-        "                            .children()\n",
-        "                            .filter('.nosetraceback')\n",
-        "                    ).toggle();\n",
-        "                }\n",
-        "            );},\n",
-        "            0);\n",
-        "    </script>\n",
-        "    \n",
-        "    <div class=\"noseresults\">\n",
-        "      <div class=\"nosebar fail leftmost\" style=\"width: 25%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar skip\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar pass rightmost\" style=\"width: 75%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      3/4 tests passed; 1 failed\n",
-        "    </div>\n",
-        "    \n",
-        "    <div class=\"nosefailure\">\n",
-        "        <div class=\"nosefailbanner\">\n",
-        "          failed: <span class=\"nosefailedfunc\">__main__.test_mean_of_empty_function_raises_value_error</span>\n",
-        "            [<a class=\"nosefailtoggle\" href=\"#\">toggle traceback</a>]\n",
-        "        </div>\n",
-        "        <pre class=\"nosetraceback\">Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"&lt;<a href=\"#ipython-input-36-bc417f346267\">ipython-input-36-bc417f346267</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([36])\")\n",
-        "                .attr(\"id\", \"ipython-input-36-bc417f346267\");\n",
-        "            </script>&gt;\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "  File \"&lt;<a href=\"#ipython-input-30-16ccb79ef6d8\">ipython-input-30-16ccb79ef6d8</a><script>\n",
-        "            $(\"div.prompt.input_prompt:contains([30])\")\n",
-        "                .attr(\"id\", \"ipython-input-30-16ccb79ef6d8\");\n",
-        "            </script>&gt;\", line 6, in mean\n",
-        "    return total/float(len(numbers))\n",
-        "ZeroDivisionError: float division by zero\n",
-        "</pre>\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 37,
-       "text": [
-        "3/4 tests passed; 1 failed\n",
-        "========\n",
-        "__main__.test_mean_of_empty_function_raises_value_error\n",
-        "========\n",
-        "Traceback (most recent call last):\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/unittest/case.py\", line 331, in run\n",
-        "    testMethod()\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/case.py\", line 197, in runTest\n",
-        "    self.test(*self.arg)\n",
-        "  File \"/Users/Jon/Applications/anaconda/lib/python2.7/site-packages/nose/tools/nontrivial.py\", line 60, in newfunc\n",
-        "    func(*arg, **kw)\n",
-        "  File \"<ipython-input-36-bc417f346267>\", line 5, in test_mean_of_empty_function_raises_value_error\n",
-        "    mean([])\n",
-        "  File \"<ipython-input-30-16ccb79ef6d8>\", line 6, in mean\n",
-        "    return total/float(len(numbers))\n",
-        "ZeroDivisionError: float division by zero\n",
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 37
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2526,8 +896,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 39
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2537,168 +906,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "html": [
-        "<div id=\"ipython_nose_cd36649ad3264c26a9a1ce96cf0984c0\"></div>"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_cd36649ad3264c26a9a1ce96cf0984c0 = $(\"#ipython_nose_cd36649ad3264c26a9a1ce96cf0984c0\");"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_cd36649ad3264c26a9a1ce96cf0984c0.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_cd36649ad3264c26a9a1ce96cf0984c0.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_cd36649ad3264c26a9a1ce96cf0984c0.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
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-      {
-       "javascript": [
-        "document.ipython_nose_cd36649ad3264c26a9a1ce96cf0984c0.append($(\"<span>.</span>\"));"
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-      {
-       "javascript": [
-        "delete document.ipython_nose_cd36649ad3264c26a9a1ce96cf0984c0;"
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-        "            font-family: monospace;\n",
-        "            font-weight: bold;\n",
-        "        }\n",
-        "        div.noseresults {\n",
-        "            width: 100%;\n",
-        "        }\n",
-        "        div.nosebar {\n",
-        "            float: left;\n",
-        "            padding: 1ex 0px 1ex 0px;\n",
-        "        }\n",
-        "        div.nosebar.fail {\n",
-        "            background: #ff3019; /* Old browsers */\n",
-        "            /* FF3.6+ */\n",
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-        "                                         color-stop(0%,#ff3019),\n",
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-        "            /* IE10+ */\n",
-        "            background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* W3C */\n",
-        "            background: linear-gradient(to bottom, #ff3019 0%,#cf0404 100%);\n",
-        "        }\n",
-        "        div.nosebar.pass {\n",
-        "            background: #52b152;\n",
-        "            background: -moz-linear-gradient(top, #52b152 1%, #008a00 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(1%,#52b152),\n",
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-        "            background: linear-gradient(to bottom, #52b152 1%,#008a00 100%);\n",
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-        "            background: linear-gradient(to bottom, #f1e767 0%,#feb645 100%);\n",
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-        "        div.nosebar.leftmost {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "        }\n",
-        "        div.nosebar.rightmost {\n",
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-        "            border-radius: 4px 0 0 4px;\n",
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-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
-        "            margin-top: 1ex;\n",
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-        "      <div class=\"nosebar pass rightmost\" style=\"width: 100%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      4/4 tests passed\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 40,
-       "text": [
-        "4/4 tests passed\n"
-       ]
-      }
-     ],
-     "prompt_number": 40
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2708,20 +916,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "ename": "ValueError",
-       "evalue": "Empty list received by mean",
-       "output_type": "pyerr",
-       "traceback": [
-        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mValueError\u001b[0m                                Traceback (most recent call last)",
-        "\u001b[0;32m<ipython-input-47-e9e2222d800d>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mmean\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-        "\u001b[0;32m<ipython-input-39-9120caace96b>\u001b[0m in \u001b[0;36mmean\u001b[0;34m(numbers)\u001b[0m\n\u001b[1;32m      2\u001b[0m     \u001b[0;34m'''Returns the mean of the provided list of numbers.'''\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      3\u001b[0m     \u001b[0;32mif\u001b[0m \u001b[0mlen\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mnumbers\u001b[0m\u001b[0;34m)\u001b[0m \u001b[0;34m==\u001b[0m \u001b[0;36m0\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 4\u001b[0;31m         \u001b[0;32mraise\u001b[0m \u001b[0mValueError\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"Empty list received by mean\"\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      5\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      6\u001b[0m     \u001b[0mtotal\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;36m0.0\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-        "\u001b[0;31mValueError\u001b[0m: Empty list received by mean"
-       ]
-      }
-     ],
-     "prompt_number": 47
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -2802,8 +997,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 48
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -2820,20 +1014,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "2011-04-22 21:06 Grizzly 36\r\n",
-        "2011-04-23 14:12 Elk 25\r\n",
-        "2011-04-23 10:24 Elk 26\r\n",
-        "2011-04-23 20:08 Wolverine 31\r\n",
-        "2011-04-23 18:46 Muskox 20\r\n"
-       ]
-      }
-     ],
-     "prompt_number": 49
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2844,23 +1025,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "(['2011-04-23', '2011-04-23'], ['14:12', '10:24'], ['Elk', 'Elk'], [25, 26])"
-       ]
-      },
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "\n"
-       ]
-      }
-     ],
-     "prompt_number": 50
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -2888,8 +1053,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 54
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2910,8 +1074,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 57
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -2921,204 +1084,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
-       "html": [
-        "<div id=\"ipython_nose_421c36436bd1424eaeea6cc04f73853f\"></div>"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_421c36436bd1424eaeea6cc04f73853f = $(\"#ipython_nose_421c36436bd1424eaeea6cc04f73853f\");"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_421c36436bd1424eaeea6cc04f73853f.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_421c36436bd1424eaeea6cc04f73853f.append($(\"<span>.</span>\"));"
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-      {
-       "javascript": [
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-      {
-       "javascript": [
-        "delete document.ipython_nose_421c36436bd1424eaeea6cc04f73853f;"
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-      {
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-        "        span.nosefailedfunc {\n",
-        "            font-family: monospace;\n",
-        "            font-weight: bold;\n",
-        "        }\n",
-        "        div.noseresults {\n",
-        "            width: 100%;\n",
-        "        }\n",
-        "        div.nosebar {\n",
-        "            float: left;\n",
-        "            padding: 1ex 0px 1ex 0px;\n",
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-        "        div.nosebar.fail {\n",
-        "            background: #ff3019; /* Old browsers */\n",
-        "            /* FF3.6+ */\n",
-        "            background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%);\n",
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-        "            /* Opera 11.10+ */\n",
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-        "            /* IE10+ */\n",
-        "            background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* W3C */\n",
-        "            background: linear-gradient(to bottom, #ff3019 0%,#cf0404 100%);\n",
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-        "            background: -moz-linear-gradient(top, #52b152 1%, #008a00 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
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-        "            background: linear-gradient(to bottom, #52b152 1%,#008a00 100%);\n",
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-        "            background: -moz-linear-gradient(top, #f1e767 0%, #feb645 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#f1e767),\n",
-        "                                         color-stop(100%,#feb645));\n",
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-        "            background: -o-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
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-        "            background: linear-gradient(to bottom, #f1e767 0%,#feb645 100%);\n",
-        "        }\n",
-        "        div.nosebar.leftmost {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "        }\n",
-        "        div.nosebar.rightmost {\n",
-        "            border-radius: 0 4px 4px 0;\n",
-        "        }\n",
-        "        div.nosefailbanner {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
-        "            margin-top: 1ex;\n",
-        "            margin-bottom: 0px;\n",
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-        "        div.nosefailbanner.expanded {\n",
-        "            border-radius: 4px 4px 0 0;\n",
-        "            border-top: 10px solid #cf0404;\n",
-        "        }\n",
-        "        pre.nosetraceback {\n",
-        "            border-radius: 0 4px 4px 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 1em;\n",
-        "            margin-left: 0px;\n",
-        "            margin-top: 0px;\n",
-        "            display: none;\n",
-        "        }\n",
-        "    </style>\n",
-        "    \n",
-        "    <script>\n",
-        "        setTimeout(function () {\n",
-        "            $('.nosefailtoggle').bind(\n",
-        "                'click',\n",
-        "                function () {\n",
-        "                    $(\n",
-        "                        $(this)\n",
-        "                            .parent().toggleClass('expanded')\n",
-        "                            .parent()\n",
-        "                            .children()\n",
-        "                            .filter('.nosetraceback')\n",
-        "                    ).toggle();\n",
-        "                }\n",
-        "            );},\n",
-        "            0);\n",
-        "    </script>\n",
-        "    \n",
-        "    <div class=\"noseresults\">\n",
-        "      <div class=\"nosebar fail leftmost\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar skip\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar pass rightmost\" style=\"width: 100%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      10/10 tests passed\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 58,
-       "text": [
-        "10/10 tests passed\n"
-       ]
-      }
-     ],
-     "prompt_number": 58
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -3181,8 +1147,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 72
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -3205,8 +1170,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [],
-     "prompt_number": 75
+     "outputs": []
     },
     {
      "cell_type": "code",
@@ -3216,228 +1180,7 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": [
-      {
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-        "<div id=\"ipython_nose_5c9bfbdef5e84275adfd02c8a2b010f0\"></div>"
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-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5c9bfbdef5e84275adfd02c8a2b010f0 = $(\"#ipython_nose_5c9bfbdef5e84275adfd02c8a2b010f0\");"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5c9bfbdef5e84275adfd02c8a2b010f0.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5c9bfbdef5e84275adfd02c8a2b010f0.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
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-      {
-       "javascript": [
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-      {
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-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5c9bfbdef5e84275adfd02c8a2b010f0.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "document.ipython_nose_5c9bfbdef5e84275adfd02c8a2b010f0.append($(\"<span>.</span>\"));"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "javascript": [
-        "delete document.ipython_nose_5c9bfbdef5e84275adfd02c8a2b010f0;"
-       ],
-       "output_type": "display_data"
-      },
-      {
-       "html": [
-        "    <style type=\"text/css\">\n",
-        "        span.nosefailedfunc {\n",
-        "            font-family: monospace;\n",
-        "            font-weight: bold;\n",
-        "        }\n",
-        "        div.noseresults {\n",
-        "            width: 100%;\n",
-        "        }\n",
-        "        div.nosebar {\n",
-        "            float: left;\n",
-        "            padding: 1ex 0px 1ex 0px;\n",
-        "        }\n",
-        "        div.nosebar.fail {\n",
-        "            background: #ff3019; /* Old browsers */\n",
-        "            /* FF3.6+ */\n",
-        "            background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%);\n",
-        "            /* Chrome,Safari4+ */\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#ff3019),\n",
-        "                                         color-stop(100%,#cf0404));\n",
-        "            /* Chrome10+,Safari5.1+ */\n",
-        "            background: -webkit-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* Opera 11.10+ */\n",
-        "            background: -o-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* IE10+ */\n",
-        "            background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%);\n",
-        "            /* W3C */\n",
-        "            background: linear-gradient(to bottom, #ff3019 0%,#cf0404 100%);\n",
-        "        }\n",
-        "        div.nosebar.pass {\n",
-        "            background: #52b152;\n",
-        "            background: -moz-linear-gradient(top, #52b152 1%, #008a00 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(1%,#52b152),\n",
-        "                                         color-stop(100%,#008a00));\n",
-        "            background: -webkit-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -o-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: -ms-linear-gradient(top, #52b152 1%,#008a00 100%);\n",
-        "            background: linear-gradient(to bottom, #52b152 1%,#008a00 100%);\n",
-        "        }\n",
-        "        div.nosebar.skip {\n",
-        "            background: #f1e767;\n",
-        "            background: -moz-linear-gradient(top, #f1e767 0%, #feb645 100%);\n",
-        "            background: -webkit-gradient(linear, left top, left bottom,\n",
-        "                                         color-stop(0%,#f1e767),\n",
-        "                                         color-stop(100%,#feb645));\n",
-        "            background: -webkit-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -o-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: -ms-linear-gradient(top, #f1e767 0%,#feb645 100%);\n",
-        "            background: linear-gradient(to bottom, #f1e767 0%,#feb645 100%);\n",
-        "        }\n",
-        "        div.nosebar.leftmost {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "        }\n",
-        "        div.nosebar.rightmost {\n",
-        "            border-radius: 0 4px 4px 0;\n",
-        "        }\n",
-        "        div.nosefailbanner {\n",
-        "            border-radius: 4px 0 0 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 0.5ex 0em 0.5ex 1em;\n",
-        "            margin-top: 1ex;\n",
-        "            margin-bottom: 0px;\n",
-        "        }\n",
-        "        div.nosefailbanner.expanded {\n",
-        "            border-radius: 4px 4px 0 0;\n",
-        "            border-top: 10px solid #cf0404;\n",
-        "        }\n",
-        "        pre.nosetraceback {\n",
-        "            border-radius: 0 4px 4px 4px;\n",
-        "            border-left: 10px solid #cf0404;\n",
-        "            padding: 1em;\n",
-        "            margin-left: 0px;\n",
-        "            margin-top: 0px;\n",
-        "            display: none;\n",
-        "        }\n",
-        "    </style>\n",
-        "    \n",
-        "    <script>\n",
-        "        setTimeout(function () {\n",
-        "            $('.nosefailtoggle').bind(\n",
-        "                'click',\n",
-        "                function () {\n",
-        "                    $(\n",
-        "                        $(this)\n",
-        "                            .parent().toggleClass('expanded')\n",
-        "                            .parent()\n",
-        "                            .children()\n",
-        "                            .filter('.nosetraceback')\n",
-        "                    ).toggle();\n",
-        "                }\n",
-        "            );},\n",
-        "            0);\n",
-        "    </script>\n",
-        "    \n",
-        "    <div class=\"noseresults\">\n",
-        "      <div class=\"nosebar fail leftmost\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar skip\" style=\"width: 0%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      <div class=\"nosebar pass rightmost\" style=\"width: 100%\">\n",
-        "          &nbsp;\n",
-        "      </div>\n",
-        "      14/14 tests passed\n",
-        "    </div>\n",
-        "    "
-       ],
-       "output_type": "pyout",
-       "prompt_number": 76,
-       "text": [
-        "14/14 tests passed\n"
-       ]
-      }
-     ],
-     "prompt_number": 76
+     "outputs": []
     },
     {
      "cell_type": "markdown",