debug a error

app.py

@@ -1,9 +1,9 @@
-
 import openai
 import os
 
 openai.api_key = os.environ.get("OPENAI_API_KEY")
 
+
 class Conversation:
     def __init__(self, prompt, num_of_round):
         self.prompt = prompt
@@ -28,25 +28,28 @@ class Conversation:
         message = response["choices"][0]["message"]["content"]
         self.messages.append({"role": "assistant", "content": message})
 
-        if len(self.messages) > self.num_of_round*2 + 1:
-            del self.messages[1:3] //Remove the first round conversation left.
+        if len(self.messages) > self.num_of_round * 2 + 1:
+            del self.messages[1:3] 
         return message
-		
+
 
 import gradio as gr
+
 prompt = """你是一个中国厨师，用中文回答做菜的问题。你的回答需要满足以下要求:
 1. 你的回答必须是中文
 2. 回答限制在100个字以内"""
 
 conv = Conversation(prompt, 10)
 
+
 def answer(question, history=[]):
     history.append(question)
     response = conv.ask(question)
     history.append(response)
-    responses = [(u,b) for u,b in zip(history[::2], history[1::2])]
+    responses = [(u, b) for u, b in zip(history[::2], history[1::2])]
     return responses, history
 
+
 with gr.Blocks(css="#chatbot{height:300px} .overflow-y-auto{height:500px}") as demo:
     chatbot = gr.Chatbot(elem_id="chatbot")
     state = gr.State([])
@@ -56,4 +59,4 @@ with gr.Blocks(css="#chatbot{height:300px} .overflow-y-auto{height:500px}") as d
 
     txt.submit(answer, [txt, state], [chatbot, state])
 
-demo.launch()
+demo.launch()