Update README.md

README.md

@@ -5,4 +5,19 @@ For testing purpose, you can use the hosted dummy dataset (`dummy_data`) as foll
 ```
 import datasets
 ds = datasets.load_dataset("ydshieh/coco_dataset_script", "2017", data_dir="./dummy_data/")
+```
+
+For using the COCO dataset (2017), you need to download it manually first:
+```
+wget http://images.cocodataset.org/zips/train2017.zip
+wget http://images.cocodataset.org/zips/val2017.zip
+wget http://images.cocodataset.org/zips/test2017.zip
+wget http://images.cocodataset.org/annotations/annotations_trainval2017.zip
+wget http://images.cocodataset.org/annotations/image_info_test2017.zip
+```
+
+Then to load the dataset:
+```
+COCO_DIR = ...(path to the downloaded dataset directory)...
+ds = datasets.load_dataset("ydshieh/coco_dataset_script", "2017", data_dir=COCO_DIR)
 ```