Update app.py

app.py

@@ -293,12 +293,8 @@ def main():
         # Launch Gradio interface
         logger.info("Launching Gradio interface...")
         
-        # Check Gradio version and use compatible parameters
-        import gradio
-        gradio_version = tuple(map(int, gradio.__version__.split('.')[:2]))
-        
-        if gradio_version >= (4, 0):
-            # Gradio 4.x+ - supports custom button labels
+        # Try with new Gradio parameters, fall back to basic if not supported
+        try:
             demo = gr.ChatInterface(
                 fn=chat_fn,
                 title="PI Policy Chatbot",
@@ -316,8 +312,9 @@ def main():
                 undo_btn="Delete Previous",
                 clear_btn="Clear Chat",
             )
-        else:
-            # Gradio 3.x - basic parameters only
+        except TypeError:
+            # Fall back to basic Gradio 3.x parameters
+            logger.info("Using Gradio 3.x compatible parameters")
             demo = gr.ChatInterface(
                 fn=chat_fn,
                 title="PI Policy Chatbot",