put command to beginnig, so imports are fail safe

Author: benman1

chapter02/Transforming Data in Scikit-Learn.ipynb

@@ -15,6 +15,16 @@
     "The dataset is available at openML."
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# making sure imbalanced-learn and scikit-learn are in compatible versions:\n",
+    "!pip install -U 'scikit-learn>=0.23' 'imbalanced-learn==0.7.0'"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,
@@ -37,52 +47,7 @@
     }
    ],
    "source": [
-    "pip install -q openml"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 2,
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Requirement already satisfied: imbalanced-learn in /Users/ben/anaconda3/lib/python3.6/site-packages (0.7.0)\n",
-      "Requirement already satisfied: scikit-learn>=0.23 in /Users/ben/anaconda3/lib/python3.6/site-packages (from imbalanced-learn) (0.23.2)\n",
-      "Requirement already satisfied: joblib>=0.11 in /Users/ben/anaconda3/lib/python3.6/site-packages (from imbalanced-learn) (0.16.0)\n",
-      "Requirement already satisfied: scipy>=0.19.1 in /Users/ben/anaconda3/lib/python3.6/site-packages (from imbalanced-learn) (1.5.2)\n",
-      "Requirement already satisfied: numpy>=1.13.3 in /Users/ben/anaconda3/lib/python3.6/site-packages (from imbalanced-learn) (1.19.1)\n",
-      "Requirement already satisfied: threadpoolctl>=2.0.0 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn>=0.23->imbalanced-learn) (2.1.0)\n",
-      "Note: you may need to restart the kernel to use updated packages.\n"
-     ]
-    }
-   ],
-   "source": [
-    "pip install imbalanced-learn"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Requirement already up-to-date: scikit-learn in /Users/ben/anaconda3/lib/python3.6/site-packages (0.23.2)\n",
-      "Requirement already satisfied, skipping upgrade: threadpoolctl>=2.0.0 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn) (2.1.0)\n",
-      "Requirement already satisfied, skipping upgrade: numpy>=1.13.3 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn) (1.19.1)\n",
-      "Requirement already satisfied, skipping upgrade: scipy>=0.19.1 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn) (1.5.2)\n",
-      "Requirement already satisfied, skipping upgrade: joblib>=0.11 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn) (0.16.0)\n",
-      "Note: you may need to restart the kernel to use updated packages.\n"
-     ]
-    }
-   ],
-   "source": [
-    "pip install --upgrade scikit-learn"
+    "!pip install -q openml"
    ]
   },
   {
@@ -1519,17 +1484,27 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 23,
+   "execution_count": 2,
    "metadata": {
     "colab": {},
     "colab_type": "code",
     "id": "cyJyWqnoclf1"
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Requirement already up-to-date: scikit-learn>=0.23 in /Users/ben/anaconda3/lib/python3.6/site-packages (0.23.2)\n",
+      "Requirement already up-to-date: imbalanced-learn==0.7.0 in /Users/ben/anaconda3/lib/python3.6/site-packages (0.7.0)\n",
+      "Requirement already satisfied, skipping upgrade: joblib>=0.11 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn>=0.23) (0.16.0)\n",
+      "Requirement already satisfied, skipping upgrade: scipy>=0.19.1 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn>=0.23) (1.5.2)\n",
+      "Requirement already satisfied, skipping upgrade: threadpoolctl>=2.0.0 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn>=0.23) (2.1.0)\n",
+      "Requirement already satisfied, skipping upgrade: numpy>=1.13.3 in /Users/ben/anaconda3/lib/python3.6/site-packages (from scikit-learn>=0.23) (1.18.5)\n"
+     ]
+    }
+   ],
    "source": [
-    "#if you run into problems with importing imblearn, you might have to downgrade scikit-learn:\n",
-    "#!pip install --upgrade scikit-learn==0.20.3\n",
-    "\n",
     "from imblearn.ensemble import (\n",
     "    BalancedRandomForestClassifier,\n",
     "    RUSBoostClassifier,\n",