Notebooks explicitly cast int64 (#555)

* Explicitly cast to int64 in example notebooks

* Remove 'pdb on' cell from notebook

Was an accidental check-in

Co-authored-by: ottonemo <marian.tietz@ottogroup.com>

notebooks/Advanced_Usage.ipynb

@@ -103,7 +103,7 @@
    "outputs": [],
    "source": [
     "X, y = make_classification(1000, 20, n_informative=10, random_state=0)\n",
-    "X = X.astype(np.float32)"
+    "X, y = X.astype(np.float32), y.astype(np.int64)"
    ]
   },
   {

notebooks/Basic_Usage.ipynb

@@ -119,7 +119,7 @@
    "outputs": [],
    "source": [
     "X, y = make_classification(1000, 20, n_informative=10, random_state=0)\n",
-    "X = X.astype(np.float32)"
+    "X, y = X.astype(np.float32), y.astype(np.int64)"
    ]
   },
   {
@@ -236,23 +236,6 @@
     "As in `sklearn`, we call `fit` passing the input data `X` and the targets `y`. By default, `NeuralNetClassifier` makes a `StratifiedKFold` split on the data (80/20) to track the validation loss. This is shown, as well as the train loss and the accuracy on the validation set."
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 9,
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Automatic pdb calling has been turned ON\n"
-     ]
-    }
-   ],
-   "source": [
-    "pdb on"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 10,