fix: Change generator predict call to implicit call

Author: jfsantos-ds

examples/regular/gan_example.ipynb

@@ -1322,13 +1322,13 @@
     "        ax = plt.subplot(rows, columns, model_step_ix*columns + 1 + (i+1) )\n",
     "\n",
     "        if with_class:\n",
-    "            g_z = generator_model.predict([z, labels])\n",
+    "            g_z = generator_model([z, labels])\n",
     "            gen_samples = DataFrame(g_z, columns=num_cols+class_labels)\n",
     "            for group, color, marker, label in zip( gen_samples.groupby('Class_1'), colors, markers, class_labels ):\n",
     "                plt.scatter( group[1][[col1]], group[1][[col2]],\n",
     "                                 label=label, marker=marker, edgecolors=color, facecolors='none' )\n",
     "        else:\n",
-    "            g_z = generator_model.predict(z)\n",
+    "            g_z = generator_model(z)\n",
     "            gen_samples = DataFrame(g_z, columns=num_cols+class_labels)\n",
     "            gen_samples.to_csv('../../data/Generated_sample.csv')\n",
     "            plt.scatter( gen_samples[[col1]], gen_samples[[col2]],\n",