fix #3317

Former-commit-id: 7dce1763be4374cf616d96db95ae964ff510a9d6

src/llmtuner/webui/common.py

@@ -3,7 +3,6 @@ import os
 from collections import defaultdict
 from typing import Any, Dict, Optional
 
-import gradio as gr
 from peft.utils import SAFETENSORS_WEIGHTS_NAME, WEIGHTS_NAME
 
 from ..extras.constants import (
@@ -17,6 +16,11 @@ from ..extras.constants import (
     DownloadSource,
 )
 from ..extras.misc import use_modelscope
+from ..extras.packages import is_gradio_available
+
+
+if is_gradio_available():
+    import gradio as gr
 
 
 ADAPTER_NAMES = {WEIGHTS_NAME, SAFETENSORS_WEIGHTS_NAME}