update robot with langchain

app.py

@@ -1,50 +1,24 @@
 import gradio as gr
 import openai
 import os
+from langchain.chains import ConversationChain
+from langchain.llms import OpenAI
+from langchain.memory import ConversationEntityMemory
+from langchain.memory.prompt import ENTITY_MEMORY_CONVERSATION_TEMPLATE
 
 openai.api_key = os.environ.get("OPENAI_API_KEY")
 
+llm = OpenAI(model_name="text-davinci-003", stop="\n\n",
+             max_tokens=2048, temperature=0.5)
+entityMemory = ConversationEntityMemory(llm=llm)
 
-class Conversation:
-    def __init__(self, prompt, num_of_round):
-        self.prompt = prompt
-        self.num_of_round = num_of_round
-        self.messages = []
-        self.messages.append({"role": "system", "content": self.prompt})
-
-    def ask(self, question):
-        try:
-            self.messages.append({"role": "user", "content": question})
-            response = openai.ChatCompletion.create(
-                model="gpt-3.5-turbo",
-                messages=self.messages,
-                temperature=0.5,
-                max_tokens=2048,
-                top_p=1,
-            )
-        except Exception as e:
-            print(e)
-            return e
-
-        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.
-        return message
-
-
-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)
+conversation = ConversationChain(
+    llm=llm, prompt=ENTITY_MEMORY_CONVERSATION_TEMPLATE, verbose=True, memory=entityMemory)
 
 
 def answer(question, history=[]):
     history.append(question)
-    response = conv.ask(question)
+    response = conversation.predict(input=question)
     history.append(response)
     responses = [(u, b) for u, b in zip(history[::2], history[1::2])]
     return responses, history
@@ -58,6 +32,9 @@ with gr.Blocks(css="#chatbot{height:300px} .overflow-y-auto{height:500px}") as d
         txt = gr.Textbox(show_label=False, placeholder="Enter text and press enter").style(
             container=False)
 
-    txt.submit(answer, [txt, state], [chatbot, state])
+    with gr.Row():
+        button = gr.Button("Submit")
+
+    button.click(answer, [txt, state], [chatbot, state])
 
 demo.launch()

requirements.txt

@@ -1 +1,3 @@
-openai==0.27.4
+openai==0.27.4
+gradio
+langchain