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实现思路
  1. 使用LangChain的ConversationChain实现对话记忆
  2. 使用streamlit作为前端交互
实现代码
from langchain.chains import ConversationChain
from langchain.memory import ConversationBufferMemory
from langchain_community.chat_models import ChatTongyi
import streamlit as st

st.set_page_config(page_title="Conversation Streamlit App")
st.title('Conversation Streamlit App')

# 实例化一个memory
memory = ConversationBufferMemory(memory_key="chat_history")

# 创建一个大模型
llm = ChatTongyi()

# 初始化history
if 'chat_history' not in st.session_state:
    st.session_state['chat_history'] = ConversationBufferMemory()

# 创建一个专用对话链
conversation = ConversationChain(
    llm=llm,
    memory=st.session_state['chat_history'],
)

# 加载历史对话消息
for msg in conversation.memory.chat_memory.messages:
    st.chat_message(msg.type).write(msg.content)

if user_input := st.chat_input(placeholder="请输入问题"):
    st.chat_message("user").write(user_input)
    ai_response = conversation.invoke(user_input)
    st.chat_message("ai").write(ai_response["response"])

本文标签: 记忆ConversationChain