mirror of
https://github.com/hwchase17/langchain.git
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429 lines
10 KiB
Plaintext
429 lines
10 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "984169ca",
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"metadata": {},
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"source": [
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"# SQL Question Answering Benchmarking: Chinook\n",
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"\n",
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"Here we go over how to benchmark performance on a question answering task over a SQL database.\n",
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"\n",
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"It is highly reccomended that you do any evaluation/benchmarking with tracing enabled. See [here](https://langchain.readthedocs.io/en/latest/tracing.html) for an explanation of what tracing is and how to set it up."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 28,
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"id": "44874486",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Comment this out if you are NOT using tracing\n",
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"import os\n",
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"\n",
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"os.environ[\"LANGCHAIN_HANDLER\"] = \"langchain\""
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]
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},
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{
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"cell_type": "markdown",
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"id": "0f66405e",
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"metadata": {},
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"source": [
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"## Loading the data\n",
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"\n",
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"First, let's load the data."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 7,
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"id": "0df1393f",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"application/vnd.jupyter.widget-view+json": {
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"model_id": "b220d07ee5d14909bc842b4545cdc0de",
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"version_major": 2,
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"version_minor": 0
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},
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"text/plain": [
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"Downloading readme: 0%| | 0.00/21.0 [00:00<?, ?B/s]"
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]
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},
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"metadata": {},
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"output_type": "display_data"
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},
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Downloading and preparing dataset json/LangChainDatasets--sql-qa-chinook to /Users/harrisonchase/.cache/huggingface/datasets/LangChainDatasets___json/LangChainDatasets--sql-qa-chinook-7528565d2d992b47/0.0.0/0f7e3662623656454fcd2b650f34e886a7db4b9104504885bd462096cc7a9f51...\n"
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]
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},
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{
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"data": {
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"application/vnd.jupyter.widget-view+json": {
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"model_id": "e89e3c8ef76f49889c4b39c624828c71",
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"version_major": 2,
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"version_minor": 0
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},
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"text/plain": [
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]
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},
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"metadata": {},
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"output_type": "display_data"
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},
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{
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"data": {
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"application/vnd.jupyter.widget-view+json": {
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"model_id": "a8421df6c26045e8978c7086cb418222",
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"version_major": 2,
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"version_minor": 0
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},
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"metadata": {},
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"output_type": "display_data"
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},
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{
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"data": {
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"application/vnd.jupyter.widget-view+json": {
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"model_id": "d1fb6becc3324a85bf039a53caf30924",
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"version_major": 2,
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"version_minor": 0
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},
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"text/plain": [
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"Extracting data files: 0%| | 0/1 [00:00<?, ?it/s]"
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]
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},
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"metadata": {},
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"output_type": "display_data"
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},
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{
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"data": {
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"application/vnd.jupyter.widget-view+json": {
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"model_id": "",
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"version_major": 2,
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"version_minor": 0
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},
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"text/plain": [
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"Generating train split: 0 examples [00:00, ? examples/s]"
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]
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},
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"metadata": {},
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"output_type": "display_data"
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},
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Dataset json downloaded and prepared to /Users/harrisonchase/.cache/huggingface/datasets/LangChainDatasets___json/LangChainDatasets--sql-qa-chinook-7528565d2d992b47/0.0.0/0f7e3662623656454fcd2b650f34e886a7db4b9104504885bd462096cc7a9f51. Subsequent calls will reuse this data.\n"
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]
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},
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{
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"data": {
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"application/vnd.jupyter.widget-view+json": {
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"model_id": "9d68ad1b3e4a4bd79f92597aac4d3cc9",
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"version_major": 2,
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"version_minor": 0
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]
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},
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"metadata": {},
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"output_type": "display_data"
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}
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],
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"source": [
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"from langchain.evaluation.loading import load_dataset\n",
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"\n",
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"dataset = load_dataset(\"sql-qa-chinook\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"id": "ab44d504",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"{'question': 'How many employees are there?', 'answer': '8'}"
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]
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},
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"execution_count": 8,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"dataset[0]"
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]
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},
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{
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"cell_type": "markdown",
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"id": "8a16b75d",
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"metadata": {},
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"source": [
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"## Setting up a chain\n",
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"This uses the example Chinook database.\n",
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"To set it up follow the instructions on https://database.guide/2-sample-databases-sqlite/, placing the `.db` file in a notebooks folder at the root of this repository.\n",
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"\n",
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"Note that here we load a simple chain. If you want to experiment with more complex chains, or an agent, just create the `chain` object in a different way."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 1,
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"id": "5b2d5e98",
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"metadata": {},
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"outputs": [],
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"source": [
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"from langchain import OpenAI, SQLDatabase, SQLDatabaseChain"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"id": "33cdcbfc",
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"metadata": {},
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"outputs": [],
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"source": [
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"db = SQLDatabase.from_uri(\"sqlite:///../../../notebooks/Chinook.db\")\n",
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"llm = OpenAI(temperature=0)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "f0b5d8f6",
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"metadata": {},
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"source": [
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"Now we can create a SQL database chain."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 14,
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"id": "8843cb0c",
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"metadata": {},
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"outputs": [],
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"source": [
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"chain = SQLDatabaseChain.from_llm(llm, db, input_key=\"question\")"
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]
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},
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{
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"cell_type": "markdown",
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"id": "6c0062e7",
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"metadata": {},
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"source": [
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"## Make a prediction\n",
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"\n",
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"First, we can make predictions one datapoint at a time. Doing it at this level of granularity allows use to explore the outputs in detail, and also is a lot cheaper than running over multiple datapoints"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 27,
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"id": "d28c5e7d",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"{'question': 'How many employees are there?',\n",
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" 'answer': '8',\n",
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" 'result': ' There are 8 employees.'}"
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]
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},
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"execution_count": 27,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"chain(dataset[0])"
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]
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},
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{
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"cell_type": "markdown",
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"id": "d0c16cd7",
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"metadata": {},
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"source": [
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"## Make many predictions\n",
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"Now we can make predictions. Note that we add a try-except because this chain can sometimes error (if SQL is written incorrectly, etc)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 19,
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"id": "24b4c66e",
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"metadata": {},
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"outputs": [],
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"source": [
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"predictions = []\n",
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"predicted_dataset = []\n",
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"error_dataset = []\n",
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"for data in dataset:\n",
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" try:\n",
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" predictions.append(chain(data))\n",
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" predicted_dataset.append(data)\n",
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" except:\n",
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" error_dataset.append(data)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "4783344b",
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"metadata": {},
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"source": [
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"## Evaluate performance\n",
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"Now we can evaluate the predictions. We can use a language model to score them programatically"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 21,
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"id": "d0a9341d",
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"metadata": {},
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"outputs": [],
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"source": [
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"from langchain.evaluation.qa import QAEvalChain"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 22,
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"id": "1612dec1",
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"metadata": {},
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"outputs": [],
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"source": [
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"llm = OpenAI(temperature=0)\n",
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"eval_chain = QAEvalChain.from_llm(llm)\n",
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"graded_outputs = eval_chain.evaluate(\n",
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" predicted_dataset, predictions, question_key=\"question\", prediction_key=\"result\"\n",
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")"
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]
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},
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{
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"cell_type": "markdown",
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"id": "79587806",
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"metadata": {},
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"source": [
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"We can add in the graded output to the `predictions` dict and then get a count of the grades."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 23,
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"id": "2a689df5",
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"metadata": {},
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"outputs": [],
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"source": [
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"for i, prediction in enumerate(predictions):\n",
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" prediction[\"grade\"] = graded_outputs[i][\"text\"]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 24,
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"id": "27b61215",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"Counter({' CORRECT': 3, ' INCORRECT': 4})"
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]
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},
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"execution_count": 24,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"from collections import Counter\n",
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"\n",
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"Counter([pred[\"grade\"] for pred in predictions])"
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]
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},
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{
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"cell_type": "markdown",
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"id": "12fe30f4",
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"metadata": {},
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"source": [
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"We can also filter the datapoints to the incorrect examples and look at them."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 25,
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"id": "47c692a1",
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"metadata": {},
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"outputs": [],
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"source": [
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"incorrect = [pred for pred in predictions if pred[\"grade\"] == \" INCORRECT\"]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 26,
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"id": "0ef976c1",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"{'question': 'How many employees are also customers?',\n",
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" 'answer': 'None',\n",
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" 'result': ' 59 employees are also customers.',\n",
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" 'grade': ' INCORRECT'}"
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]
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},
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"execution_count": 26,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"incorrect[0]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "7710401a",
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.11.3"
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},
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"nbformat": 4,
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