AI tools
January 16, 2024

How To Use Langchain To ChatWith Your PDFs

A step-by-step guide on how to use Langchain to chat with your PDFs.

Jim Clyde Monge
by 
Jim Clyde Monge

Things are going wild in the world of AI today. It’s like a rodeo out there, with new and exciting developments busting out of the gates almost every day.

Today, I am going to share another round of “What crazy things can AI do now?”

LangChain Ask PDF is an AI-powered application that lets you talk to your PDF files in natural language. Simply upload your PDF file to the application and then type in your questions. LangChain Ask PDF will then process your questions and return answers based on the content of your PDF file.

In this article, I will guide you through the process of setting up and testing the AI tool. Let’s get started.

What you need

Step #1: Set up the project

The first step towards setting up LangChain Ask PDF is to download or clone the project repository from GitHub.

You should see these project files on your local disk.

Set up the project The first step towards setting up LangChain Ask PDF is to download or clone the project repository from GitHub. You should see these project files on your local disk.
Image by Jim Clyde Monge

Next, open the project in Visual Studio Code and run the following command in the terminal:

pip install -r requirements.txt

This command will automatically start the Streamlit application, which should open in your default web browser.

Run the application With the environment variables set up, you can now run the application. In your terminal, run the command: streamlit run app.py This command will automatically start the Streamlit application, which should open in your default web browser.
Image by Jim Clyde Monge

Once the application is running, you can begin uploading and “talking” to your documents.

Step #4: Test the application

To verify that everything is working as expected, try uploading a PDF file by clicking on the “Browse files” button. After your file has been parsed by the application, a chat box should appear where you can type in your questions.

Test the application To verify that everything is working as expected, try uploading a PDF file by clicking on the “Browse files” button. After your file has been parsed by the application, a chat box should appear where you can type in your questions.
Image by Jim Clyde Monge

The AI-powered app will then process your questions and return answers based on the content of your uploaded PDF file. It’s as if you’re having a conversation with your document.

Amazing, isn’t it?

Final Thoughts

Overall, I am impressed with how easy it is to build your own chatbot nowadays. If you’re a developer, there are countless ways you can modify these chatbots and build more amazing products quickly with frameworks like Streamlit.

So the next time you find yourself wrestling with a hefty PDF, remember that AI tools like LangChain Ask PDF can help you extract the information you need quickly and easily.