langchain/libs/cli/README.md

langchain-cli

Install CLI

pip install -U --pre langchain-cli

Create new langchain app

langchain serve new my-app

Go into app

cd my-app

Install a package

langchain serve add extraction-summary

(Activate virtualenv)

Install langserve

pip install "langserve[all]"

Install the langchain package

pip install -e packages/extraction-summary

Edit app/server.py to add that package to the routes

from fastapi import FastAPI
from langserve import add_routes 
from extraction_summary.chain import chain

app = FastAPI()

add_routes(app, chain)

Run the app

python app/server.py