Update app.py

app.py

@@ -58,9 +58,12 @@ if st.button("Submit"):
                 )
                 st.write('Passed model')
                 response = ""
-                for chunk in chat_streaming:
-                    response += chunk.choices[0].delta.content
-                st.write("### Response:")
-                st.write(response)
-            except Exception as e:
-                st.error(f"Failed to process query: {e}")
+                try:
+                    for chunk in chat_streaming:
+                        content = chunk.choices[0].delta.content
+                        if content:  # Ensure content is not None
+                            response += content
+                    st.write("### Response:")
+                    st.write(response)
+                except Exception as e:
+                    st.error(f"Failed to process query: {e}")