Update app.py

app.py

@@ -38,7 +38,8 @@ if prompt := st.chat_input("What is up?"):
             ],
             stream=True,
         ):
-            full_response += (response.choices[0].delta.content or "")
-            message_placeholder.markdown(full_response + "▌")
+            if len(response.choices) > 0:
+                full_response += (response.choices[0].delta.content or "")
+                message_placeholder.markdown(full_response + "▌")
         message_placeholder.markdown(full_response)
     st.session_state.messages.append({"role": "assistant", "content": full_response})