Update app.py

app.py

@@ -90,15 +90,18 @@ def respond(message, system_prompt, history, model, temperature, num_calls, use_
         full_response = ""
         for main_content, sources in get_response_with_search(message, model, num_calls=num_calls, temperature=temperature, use_embeddings=use_embeddings, system_prompt=system_prompt):
             full_response += main_content
-            yield history + [(message, full_response)]
+            new_history = history + [(message, full_response)]
+            yield new_history
         
         if sources:
             full_response += f"\n\nSources:\n{sources}"
-            yield history + [(message, full_response)]
+            new_history = history + [(message, full_response)]
+            yield new_history
     except Exception as e:
         logging.error(f"Error with {model}: {str(e)}")
         error_message = f"An error occurred with the {model} model: {str(e)}. Please try again or select a different model."
-        yield history + [(message, error_message)]
+        new_history = history + [(message, error_message)]
+        yield new_history
 
 def create_web_search_vectors(search_results):
     embed = get_embeddings()