fix #3317

Former-commit-id: 7dce1763be4374cf616d96db95ae964ff510a9d6

src/llmtuner/extras/packages.py

@@ -25,6 +25,10 @@ def is_galore_available():
     return _is_package_available("galore_torch")
 
 
+def is_gradio_available():
+    return _is_package_available("gradio")
+
+
 def is_jieba_available():
     return _is_package_available("jieba")