first_call_chain

The Developer's Guide to AI - From Prompts to Agents

Introduction

Converting the Getting Started example to a Langchain call chain.

Quick Start

The following steps will get you up and running on your machine.

0. Install Ollama and run:

• Download and install: https://ollama.com
• Verify the install and start Llama in a terminal window:

~ % ollama run llama3.2

1. Clone this project into a local directory:

~ % git clone <url>

2. Install Python (if necessary)

It's recommended that you setup a virtual environment before installing Python or Python modules. You can see how to do that here:

Python Virtual Environment

If you would rather install Python globally, follow the instructions here:

• Download and install: https://www.python.org/downloads/
• Verify the install in your terminal:

~ % python -V

• If the installation succeeded, the version will print

3. Install Python modules

• Navigate to the project part2/first_call_chain directory in your terminal and run:

~/developers-guide-to-ai/part2/first_call_chain % pip install -r requirements.txt

• Navigate to the project part1/client directory in your terminal and run:

~/developers-guide-to-ai/part1/client % npm install

4. Launch the server

• In a terminal, navigate to the part2/first_call_chain directory and run the following command:

~/developers-guide-to-ai/part2/first_call_chain % fastapi dev main.py

5. Launch the client

• In a separate terminal, navigate to the part1/client directory and run the following commands:

~/developers-guide-to-ai/part1/client % npm run dev

6. Open your web browser and visit: http://localhost:5173

7. Input a question and click Call your API to see the response streamed from Llama 3.2 3B