skip grid search cv in build leaf if param_dict is empty; version 0.2.4

Author: ZebinYang

examples/demo.ipynb

@@ -218,24 +218,6 @@
     "pred_test = clf.predict_proba(test_x)[:, 1]\n",
     "roc_auc_score(train_y, pred_train.ravel()), roc_auc_score(test_y, pred_test.ravel())"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {
-    "ExecuteTime": {
-     "start_time": "2021-12-27T12:27:37.691Z"
-    }
-   },
-   "outputs": [],
-   "source": [
-    "clf = GLMTreeClassifier(max_depth=1, min_samples_leaf=50, reg_lambda=[1e4],\n",
-    "                        n_split_grid=20, n_screen_grid=5, n_feature_search=10)\n",
-    "clf.fit(train_x, train_y)\n",
-    "pred_train = clf.predict_proba(train_x)[:, 1]\n",
-    "pred_test = clf.predict_proba(test_x)[:, 1]\n",
-    "roc_auc_score(train_y, pred_train.ravel()), roc_auc_score(test_y, pred_test.ravel())"
-   ]
   }
  ],
  "metadata": {