langchain/docs/use_cases/evaluation/qa_generation.ipynb

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  {
   "cell_type": "markdown",
   "id": "ee2a3a21",
   "metadata": {},
   "source": [
    "# QA Generation\n",
    "This notebook shows how to use the `QAGenerationChain` to come up with question-answer pairs over a specific document.\n",
    "This is important because often times you may not have data to evaluate your question-answer system over, so this is a cheap and lightweight way to generate it!"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "33d3f0b4",
   "metadata": {},
   "outputs": [],
   "source": [
    "from langchain.document_loaders import TextLoader"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "2029a29c",
   "metadata": {},
   "outputs": [],
   "source": [
    "loader = TextLoader(\"../../modules/state_of_the_union.txt\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "87edb84c",
   "metadata": {},
   "outputs": [],
   "source": [
    "doc = loader.load()[0]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "04125b6d",
   "metadata": {},
   "outputs": [],
   "source": [
    "from langchain.chat_models import ChatOpenAI\n",
    "from langchain.chains import QAGenerationChain\n",
    "chain = QAGenerationChain.from_llm(ChatOpenAI(temperature = 0))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "4f1593e4",
   "metadata": {},
   "outputs": [],
   "source": [
    "qa = chain.run(doc.page_content)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "ee831f92",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'question': 'What is the U.S. Department of Justice doing to combat the crimes of Russian oligarchs?',\n",
       " 'answer': 'The U.S. Department of Justice is assembling a dedicated task force to go after the crimes of Russian oligarchs.'}"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "qa[1]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "7028754e",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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