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This page covers how to use the Lantern within LangChain It is broken into two parts: setup, and then references to specific Lantern wrappers.

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Setup

  1. The first step is to create a database with the lantern extension installed. Follow the steps at Lantern Installation Guide to install the database and the extension. The docker image is the easiest way to get started.

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Wrappers

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VectorStore

There exists a wrapper around Postgres vector databases, allowing you to use it as a vectorstore, whether for semantic search or example selection. To import this vectorstore: 
from langchain_community.vectorstores import Lantern

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Usage

For a more detailed walkthrough of the Lantern Wrapper, see this notebook