Add check whether files already exist

category_classification/datasets/en/download_train_test.py

@@ -11,5 +11,10 @@ test_dataset = "arxiv_test.json"
 train_dataset = "arxiv_train.json"
 
 dataset_path = Path(dataset_download(dataset))
-os.symlink(dataset_path / test_dataset, test_dataset)
-os.symlink(dataset_path / train_dataset, train_dataset)
+test_file_path = dataset_path / test_dataset
+train_file_path = dataset_path / train_dataset
+
+if not test_file_path.exists():
+    os.symlink(dataset_path / test_dataset, test_dataset)
+if not train_file_path.exists():
+    os.symlink(dataset_path / train_dataset, train_dataset)