Update app.py

app.py

@@ -38,14 +38,14 @@ examples = ['What is the capital of China?',
 
 def add_text(history, text):
     history = [] if history is None else history
-    history = history + [(text, None)]
+    history.append((text, None))
     return history, gr.Textbox(value="", interactive=False)
 
 def api_call(history, api_kind, table_name, openai_key, rerank):
     last = None
     for output in bot(history, api_kind, table_name, openai_key, rerank):
         last = output
-    return str(last[0][0])
+    return str(last)
 
 def bot(history, api_kind, table_name, openai_key, rerank):
     top_k_rank = 4