history.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "7af24818-82f3-4440-ae49-e3e4cd310bf0",
   "metadata": {},
   "outputs": [],
   "source": [
    "from langchain_core.prompts import ChatPromptTemplate\n",
    "from langchain_openai import ChatOpenAI\n",
    "from langchain_core.runnables.history import RunnableWithMessageHistory,BaseChatMessageHistory\n",
    "from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder\n",
    "from langchain_openai.chat_models import ChatOpenAI\n",
    "from langchain_community.chat_message_histories import ChatMessageHistory"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "e2cc101b-07ab-4f3e-bd7a-2fa220bdbc9e",
   "metadata": {},
   "outputs": [],
   "source": [
    "llm = ChatOpenAI(model=\"gpt-3.5-turbo\", max_tokens=4096)\n",
    "prompt = ChatPromptTemplate.from_messages(\n",
    "    [\n",
    "        (\n",
    "            \"system\",\n",
    "            \"你是一个智能聊天机器人，名字叫二狗，请用markdown格式回答任何问题\",\n",
    "        ),\n",
    "        MessagesPlaceholder(variable_name=\"history\"),\n",
    "        (\"human\", \"{input}\"),\n",
    "    ]\n",
    ")\n",
    "chain = prompt | llm\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "73c78136-3877-4b0f-a2c1-dffde8179816",
   "metadata": {},
   "outputs": [],
   "source": [
    "store = {}\n",
    "def get_session_history(session_id: str) -> BaseChatMessageHistory:\n",
    "    if session_id not in store:\n",
    "        store[session_id] = ChatMessageHistory()\n",
    "    return store[session_id]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "fa8040a8-df30-4c95-818a-81b1c718ba9c",
   "metadata": {},
   "outputs": [],
   "source": [
    "with_message_history = RunnableWithMessageHistory(\n",
    "    chain,\n",
    "    get_session_history,\n",
    "    input_messages_key=\"input\",\n",
    "    history_messages_key=\"history\",\n",
    ")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "ad27631c-8859-4b53-a074-1be2a4773c3a",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Parent run 211b4f22-547b-4b12-a1b6-703bfe4984e0 not found for run 8160f67d-1943-4e8b-9213-603894309650. Treating as a root run.\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "AIMessage(content='你刚说的是：“我刚说过什么？？”', response_metadata={'token_usage': {'completion_tokens': 17, 'prompt_tokens': 52, 'total_tokens': 69}, 'model_name': 'gpt-3.5-turbo', 'system_fingerprint': None, 'finish_reason': 'stop', 'logprobs': None}, id='run-916f3ffe-4585-4d86-8466-b3960d13ef04-0')"
      ]
     },
     "execution_count": 19,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "\n",
    "res = with_message_history.invoke(\n",
    "    {\"input\": \"我刚说过什么？？\"},\n",
    "    config={\"configurable\": {\"session_id\": \"111\"}}\n",
    ")\n",
    "res"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "cca94403-8c9e-4483-bfcf-8ee737668126",
   "metadata": {},
   "outputs": [],
   "source": [
    "from langchain_community.chat_message_histories import SQLChatMessageHistory\n",
    "\n",
    "def get_session_history(session_id: str) -> BaseChatMessageHistory:\n",
    "    return SQLChatMessageHistory(\n",
    "        session_id=session_id, connection_string=\"sqlite:///langchain.db\"\n",
    "    )\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "b79f5ac3-6092-40c0-8ce5-6855f936c387",
   "metadata": {},
   "outputs": [],
   "source": [
    "with_message_history = RunnableWithMessageHistory(\n",
    "    chain,\n",
    "    get_session_history,\n",
    "    input_messages_key=\"input\",\n",
    "    history_messages_key=\"history\",\n",
    ")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "5d4ef1fc-5b97-4611-bfe0-47bdfa84cd72",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Parent run e1da6d41-e78f-4f4b-814a-8e001207ccec not found for run 30eb9a65-ecbd-4eb0-9ad6-a4eec83fa4be. Treating as a root run.\n"
     ]
    }
   ],
   "source": [
    "res = with_message_history.invoke(\n",
    "    {\"input\": \"我刚说过什么？？\"},\n",
    "    config={\"configurable\": {\"session_id\": \"111\"}}\n",
    ")\n",
    "res"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "7141c920-1b3d-4496-bc2e-53b35d47297f",
   "metadata": {},
   "outputs": [],
   "source": [
    "history = get_session_history(\"111\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "6a194537-4774-41a6-ad59-756c5c502cee",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[HumanMessage(content='我刚说过什么？？'),\n",
       " AIMessage(content='你刚说：“我刚说过什么？？”', response_metadata={'token_usage': {'completion_tokens': 15, 'prompt_tokens': 52, 'total_tokens': 67}, 'model_name': 'gpt-3.5-turbo', 'system_fingerprint': None, 'finish_reason': 'stop', 'logprobs': None}, id='run-1260d9af-8731-486a-a29d-061e42e6e219-0')]"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "history.messages"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "9eb8c710-ea73-4cec-8d99-d834d0c34254",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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