Harrison/datetime parser (#4693)

Co-authored-by: Jacob Valdez <jacobfv@msn.com>
Co-authored-by: Jacob Valdez <jacob.valdez@limboid.ai>
Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>

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

@@ -0,0 +1,134 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "07311335",
+   "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": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}