Query processed PDF with HuggingChat

This example uses the Unstructured Ingest Python library or the Unstructured JavaScript/TypeScript SDK to send a PDF file to Unstructured API services for processing. Unstructured processes the PDF and extracts the PDF’s content. This example then sends some of the content to HuggingChat, Hugging Face’s open-source AI chatbot, along with some queries about this content.

To run this example, you’ll need:

• The hugchat package for Python, or the huggingface-chat package for JavaScript/TypeScript.
• Your Unstructured API key and API URL. Get an API key and API URL.
• Your Hugging Face account’s email address and account password. Get an account.
• A PDF file for Unstructured to process. This example uses a sample PDF file containing the text of the United States Constitution, available for download from https://constitutioncenter.org/media/files/constitution.pdf.

These environment variables:

• UNSTRUCTURED_API_KEY - Your Unstructured API key value.
• UNSTRUCTURED_API_URL - Your Unstructured API URL.

These environment variables:

• HUGGING_FACE_EMAIL, representing your Hugging Face account’s email address.
• HUGGING_FACE_PASSWORD, representing your Hugging Face account’s email address.
• HUGGING_FACE_COOKIE_DIR_PATH, representing a login cookie cache path, typically ./cookies/ or ./login_cache/.

This example’s code is as follows:

Ingest Python library

Python

from unstructured_ingest.v2.pipeline.pipeline import Pipeline
from unstructured_ingest.v2.interfaces import ProcessorConfig
from unstructured_ingest.v2.processes.connectors.local import (
    LocalIndexerConfig,
    LocalDownloaderConfig,
    LocalConnectionConfig,
    LocalUploaderConfig
)
from unstructured_ingest.v2.processes.partitioner import PartitionerConfig

import os, json
from hugchat import hugchat
from hugchat.login import Login
    
def generate_json_from_local(
        input_path: str,
        output_dir: str,
        partition_by_api: bool = False,
        api_key: str = None,
        partition_endpoint: str = None,
        split_pdf_page: bool = True,
        split_pdf_allow_failed: bool = True,
        split_pdf_concurrency_level: int = 15
    ):
    Pipeline.from_configs(
        context=ProcessorConfig(),
        indexer_config=LocalIndexerConfig(input_path=input_path),
        downloader_config=LocalDownloaderConfig(),
        source_connection_config=LocalConnectionConfig(),
        partitioner_config=PartitionerConfig(
            partition_by_api=partition_by_api,
            api_key=api_key,
            partition_endpoint=partition_endpoint,
            additional_partition_args={
                "split_pdf_page": split_pdf_page,
                "split_pdf_allow_failed": split_pdf_allow_failed,
                "split_pdf_concurrency_level": split_pdf_concurrency_level
            }
        ),
        uploader_config=LocalUploaderConfig(output_dir=output_dir)
    ).run()

def extract_matching_texts_from_local(input_json_file_path: str, text_to_match: str) -> str:
    voting_texts = ""

    with open(input_json_file_path, 'r') as file:
        file_elements = json.load(file)

    for element in file_elements:
        if text_to_match in element["text"]:
            voting_texts += " " + element["text"]

    return voting_texts

def log_in_to_hugging_face(email: str, passwd: str, cookie_dir_path: str) -> hugchat.ChatBot:
    sign = Login(
        email=email,
        passwd=passwd
    )

    cookies = sign.login(cookie_dir_path=cookie_dir_path)

    return hugchat.ChatBot(cookies=cookies.get_dict())

if __name__ == "__main__":
    generate_json_from_local(
        input_path=os.getenv("LOCAL_FILE_INPUT_DIR"),
        output_dir=os.getenv("LOCAL_FILE_OUTPUT_DIR"),
        partition_by_api=True,
        api_key=os.getenv("UNSTRUCTURED_API_KEY"),
        partition_endpoint=os.getenv("UNSTRUCTURED_API_URL")
    )

    chatbot = log_in_to_hugging_face(
        email=os.getenv("HUGGING_FACE_EMAIL"),
        passwd=os.getenv("HUGGING_FACE_PASSWORD"),
        cookie_dir_path=os.getenv("HUGGING_FACE_COOKIE_DIR_PATH")
    )

    voting_texts = extract_matching_texts_from_local(
        input_json_file_path=f"{os.getenv("LOCAL_FILE_OUTPUT_DIR")}/constitution.json",
        text_to_match="vot"
    )

    print("\n-----\n")
    print("Querying HuggingChat...")
    print("\n-----\n")

    req = f"Given the following information, what is the minimum voting age in the United States? {voting_texts}"
    print(req)
    print("\n-----\n")
    print(chatbot.chat(text=req))

    print("\n-----\n")
    print("Querying HuggingChat again...")
    print("\n-----\n")

    follow_up = "And when were women given the right to vote in the United States?"
    print(follow_up)
    print("\n-----\n")

    print(chatbot.chat(text=follow_up))

JavaScript/TypeScript SDK

Unstructured recommends that you use the Unstructured Ingest Python library instead.

The Ingest Python library provides faster processing of larger individual files, and faster and easier processing of multiple files at a time in batches.

TypeScript

import { UnstructuredClient } from "unstructured-client";
import { Strategy } from "unstructured-client/sdk/models/shared/index.js";
import { PartitionResponse } from "unstructured-client/sdk/models/operations";

import * as fs from "fs";
import * as path from 'path';
import { fileURLToPath } from 'url';
import { Login, ChatBot} from "huggingface-chat";

const key = process.env.UNSTRUCTURED_API_KEY || '';
const url = process.env.UNSTRUCTURED_API_URL || '';
const username = process.env.HUGGING_FACE_EMAIL || '';
const userpassword = process.env.HUGGING_FACE_PASSWORD || '';
const cookieDirPath = process.env.HUGGING_FACE_COOKIE_DIR_PATH || '';

const inputFilepath = path.dirname(fileURLToPath(import.meta.url)) + 
                      "/local-ingest-pdf-source/constitution.pdf"

async function getChatBot(email: string, password: string, cachePath: string): Promise<ChatBot> {
    const signin = new Login(email, password)
    const result = await signin.login(cachePath)
    const chat = new ChatBot(result)

    return chat
}

async function queryAndResponse(chatbot: ChatBot, query: string) {
    let data = await chatbot.chat(query)

    if (! data) {
        console.log("No data available.");
        return;
    }
    
    let reader = data.stream?.getReader();

    if (! reader) {
        console.log("No stream available.");
        return;
    }

    while (true) {
        const { done, value } = await reader?.read();
        if (done) break;
        process.stdout.write(value);
    }    
}

const client = new UnstructuredClient({
    security: { apiKeyAuth: key },
    serverURL: new URL(url).origin
});

const data = fs.readFileSync(inputFilepath);

client.general.partition({
    partitionParameters: {
        files: {
            content: data,
            fileName: inputFilepath
        },
        strategy: Strategy.HiRes,
        splitPdfPage: true,
        splitPdfAllowFailed: true,
        splitPdfConcurrencyLevel: 15
    }
}).then(async (res: PartitionResponse) => {
    if (res.statusCode == 200) {
        let voting_texts = ""

        if (res.elements)
            for (const element of res.elements) {
                if (element.text.includes("vot")) {
                    voting_texts += " " + element.text;
                }
        }

        let chat = await getChatBot(username, userpassword, cachePath)
        
        await chat.initialize()

        const firstQuery = 'Given the following information, what is the minimum voting age in the United States?'
        const secondQuery = 'And when were women given the right to vote in the United States?'

        console.log(`${firstQuery} ${voting_texts}\n\n-----\n`)
        await queryAndResponse(chat, firstQuery)
        console.log(`\n\n-----\n`)
        console.log(`${secondQuery}\n\n-----\n`)
        await queryAndResponse(chat, secondQuery)
    }    
}).catch((e) => {
    if (e.statusCode) {
        console.log(e.statusCode);
        console.log(e.body);
    } else {
        console.log(e);
    }
});