fix #3317

Former-commit-id: 7dce1763be4374cf616d96db95ae964ff510a9d6

src/llmtuner/webui/components/export.py

@@ -1,12 +1,15 @@
 from typing import TYPE_CHECKING, Dict, Generator, List
 
-import gradio as gr
-
+from ...extras.packages import is_gradio_available
 from ...train import export_model
 from ..common import get_save_dir
 from ..locales import ALERTS
 
 
+if is_gradio_available():
+    import gradio as gr
+
+
 if TYPE_CHECKING:
     from gradio.components import Component