Update preset (#3516)

Author: lisadunlap

fastchat/serve/vision/create_vqa_examples_json.py

@@ -28,7 +28,11 @@
     for dataset_name in dataset_prop.keys():
         with open(f"{args.output_dir}/{dataset_name}/data.json") as f:
             data = json.load(f)
-            dataset_json.extend(np.random.choice(data, dataset_prop[dataset_name]))
+            dataset_json.extend(
+                np.random.choice(
+                    data, min(dataset_prop[dataset_name], len(data)), replace=False
+                )
+            )
 
     with open(f"{args.output_dir}/metadata_sampled.json", "w") as f:
         json.dump(dataset_json, f, indent=4)