Update app.py

app.py

@@ -21,6 +21,10 @@ def transcribe_audio_and_chat(audio_filepath, history, api_key):
     if not api_key:
         raise gr.Error("❌ Please enter your OpenAI API key.")
 
+    # Always ensure history is a list, even if it somehow became None
+    if history is None:
+        history = []
+
     if audio_filepath is None:
         raise gr.Error("No audio received. Please speak into the microphone.")
 
@@ -37,10 +41,12 @@ def transcribe_audio_and_chat(audio_filepath, history, api_key):
         except sr.UnknownValueError:
             # If speech is unintelligible, add an assistant message to history
             history.append({"role": "assistant", "content": "Sorry, I could not understand the audio. Please try again."})
+            # Return history for chatbot, and None for audio input
             return history, None
         except sr.RequestError as e:
             # If API request fails, add an assistant message to history
             history.append({"role": "assistant", "content": f"Could not request results from Google Speech Recognition service; {e}"})
+            # Return history for chatbot, and None for audio input
             return history, None
 
         finally:
@@ -70,14 +76,15 @@ def transcribe_audio_and_chat(audio_filepath, history, api_key):
         history.append({"role": "user", "content": user_input})
         history.append({"role": "assistant", "content": bot_reply})
         
-        # Return the updated history for the chatbot component, and clear the audio input.
-        return history, None
+        # Return the updated history for the chatbot component (state),
+        # and None for the audio input to clear it.
+        return history, None # CORRECT: Return history for 'state' output, None for audio input
 
     except Exception as e:
         print(f"An unexpected error occurred: {e}") # Log the error
         raise gr.Error(f"❌ An unexpected error occurred: {str(e)}")
 
-# --- Gradio UI setup ---
+# --- Gradio UI setup (no changes needed here) ---
 with gr.Blocks(title="Voice Bot: Krishnavamshi Thumma") as demo:
     gr.Markdown("## 🎙️ Krishnavamshi Thumma - Voice Assistant")
 
@@ -125,9 +132,8 @@ with gr.Blocks(title="Voice Bot: Krishnavamshi Thumma") as demo:
     api_key = gr.Textbox(label="🔐 OpenAI API Key", type="password", elem_id="apiKeyInput")
     key_status = gr.HTML("<div id='keyStatus'></div>")
     
-    # Crucially, set type="messages" here to match OpenAI's expected format
     chatbot = gr.Chatbot(elem_id="chatBox", type="messages", height=400)
-    state = gr.State([]) # Now `state` will directly hold OpenAI-compatible messages
+    state = gr.State([]) # `state` will hold OpenAI-compatible messages
 
     audio_input = gr.Audio(
         sources=["microphone"],
@@ -142,7 +148,7 @@ with gr.Blocks(title="Voice Bot: Krishnavamshi Thumma") as demo:
     audio_input.change(
         transcribe_audio_and_chat,
         inputs=[audio_input, state, api_key],
-        outputs=[chatbot, state]
+        outputs=[chatbot, state] # Ensure chatbot and state are updated
     )
 
     gr.HTML("""
@@ -162,7 +168,7 @@ with gr.Blocks(title="Voice Bot: Krishnavamshi Thumma") as demo:
     </script>
     """)
 
-    # When clearing, ensure state is reset to an empty list, matching the 'messages' format
+    # When clearing, ensure state is reset to an empty list
     clear_btn.click(lambda: ([], []), None, [chatbot, state])
 
 demo.launch()