langchain/docs/modules/prompts/output_parsers/examples/datetime.ipynb

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 "cells": [
  {
   "cell_type": "markdown",
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   "metadata": {},
   "source": [
    "# Datetime\n",
    "\n",
    "This OutputParser shows out to parse LLM output into datetime format."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "77e49a3d",
   "metadata": {},
   "outputs": [],
   "source": [
    "from langchain.prompts import PromptTemplate\n",
    "from langchain.output_parsers import DatetimeOutputParser\n",
    "from langchain.chains import LLMChain\n",
    "from langchain.llms import OpenAI"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "ace93488",
   "metadata": {},
   "outputs": [],
   "source": [
    "output_parser = DatetimeOutputParser()\n",
    "template = \"\"\"Answer the users question:\n",
    "\n",
    "{question}\n",
    "\n",
    "{format_instructions}\"\"\"\n",
    "prompt = PromptTemplate.from_template(template, partial_variables={\"format_instructions\": output_parser.get_format_instructions()})"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "9240a3ae",
   "metadata": {},
   "outputs": [],
   "source": [
    "chain = LLMChain(prompt=prompt, llm=OpenAI())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "ad62eacc",
   "metadata": {},
   "outputs": [],
   "source": [
    "output = chain.run(\"around when was bitcoin founded?\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "96657765",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'\\n\\n2008-01-03T18:15:05.000000Z'"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "output"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "bf714e52",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "datetime.datetime(2008, 1, 3, 18, 15, 5)"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "output_parser.parse(output)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "a56112b1",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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