Drop Python 2 (woohoo!) and import matplotlib as mpl

07_ensemble_learning_and_random_forests.ipynb

@@ -25,7 +25,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "First, let's make sure this notebook works well in both python 2 and 3, import a few common modules, ensure MatplotLib plots figures inline and prepare a function to save the figures:"
+    "First, let's import a few common modules, ensure MatplotLib plots figures inline and prepare a function to save the figures. We also check that Python 3.5 or later is installed (although Python 2.x may work, it is deprecated so we strongly recommend you use Python 3 instead)."
    ]
   },
   {
@@ -34,8 +34,9 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# To support both python 2 and python 3\n",
-    "from __future__ import division, print_function, unicode_literals\n",
+    "# Python ≥3.5 is required\n",
+    "import sys\n",
+    "assert sys.version_info >= (3, 5)\n",
     "\n",
     "# Common imports\n",
     "import numpy as np\n",
@@ -46,11 +47,11 @@
     "\n",
     "# To plot pretty figures\n",
     "%matplotlib inline\n",
-    "import matplotlib\n",
+    "import matplotlib as mpl\n",
     "import matplotlib.pyplot as plt\n",
-    "plt.rcParams['axes.labelsize'] = 14\n",
-    "plt.rcParams['xtick.labelsize'] = 12\n",
-    "plt.rcParams['ytick.labelsize'] = 12\n",
+    "mpl.rc('axes', labelsize=14)\n",
+    "mpl.rc('xtick', labelsize=12)\n",
+    "mpl.rc('ytick', labelsize=12)\n",
     "\n",
     "# Where to save the figures\n",
     "PROJECT_ROOT_DIR = \".\"\n",
@@ -454,7 +455,7 @@
    "source": [
     "def plot_digit(data):\n",
     "    image = data.reshape(28, 28)\n",
-    "    plt.imshow(image, cmap = matplotlib.cm.hot,\n",
+    "    plt.imshow(image, cmap = mpl.cm.hot,\n",
     "               interpolation=\"nearest\")\n",
     "    plt.axis(\"off\")"
    ]
@@ -1336,7 +1337,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 - tf2",
    "language": "python",
    "name": "python3"
   },
@@ -1350,7 +1351,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.6"
+   "version": "3.6.8"
   },
   "nav_menu": {
    "height": "252px",