Interact with OpenAI Using LangChain
Use LangChain to interact with OpenAI’s Chat API and generate responses
Prerequisite You should have an API key from OpenAI and have it stored in a .env file.
Introduction
This guide shows how to use LangChain to interact with OpenAI’s Chat API and generate responses. You’ll learn how to set up your environment, configure your API key, and invoke responses using LangChain.
Setup
Step 1: Install Required Packages
First, install the necessary packages using pip:
Step 2: Create a .env File
Create a .env
file in the project root with your OpenAI API key:
Interacting with OpenAI
Step 3: Create the Python Script
Create a Python script named langchain-openai-example.py
with the following content:
Step 4: Run the Script
Ensure you have the .env
file in the same directory as the script. Then, execute the script:
Conclusion
You have successfully used LangChain to interact with OpenAI’s Chat API and generate responses! This guide provided two methods for invocation: direct invocation and using a prompt template. You can now expand on this by customizing the prompts and handling different types of input.