langchain/templates/shopping-assistant/README.md

# shopping-assistant

This template creates a shopping assistant that helps users find products that they are looking for.

This template will use `Ionic` to search for products.

## Environment Setup

This template will use `OpenAI` by default.
Be sure that `OPENAI_API_KEY` is set in your environment.

## Usage

To use this package, you should first have the LangChain CLI installed:

```shell
pip install -U langchain-cli
```

To create a new LangChain project and install this as the only package, you can do:

```shell
langchain app new my-app --package shopping-assistant
```

If you want to add this to an existing project, you can just run:

```shell
langchain app add shopping-assistant
```

And add the following code to your `server.py` file:
```python
from shopping_assistant.agent import agent_executor as shopping_assistant_chain

add_routes(app, shopping_assistant_chain, path="/shopping-assistant")
```

(Optional) Let's now configure LangSmith.
LangSmith will help us trace, monitor and debug LangChain applications.
You can sign up for LangSmith [here](https://smith.langchain.com/).
If you don't have access, you can skip this section


```shell
export LANGCHAIN_TRACING_V2=true
export LANGCHAIN_API_KEY=<your-api-key>
export LANGCHAIN_PROJECT=<your-project>  # if not specified, defaults to "default"
```

If you are inside this directory, then you can spin up a LangServe instance directly by:

```shell
langchain serve
```

This will start the FastAPI app with a server is running locally at
[http://localhost:8000](http://localhost:8000)

We can see all templates at [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs)
We can access the playground at [http://127.0.0.1:8000/shopping-assistant/playground](http://127.0.0.1:8000/shopping-assistant/playground)

We can access the template from code with:

```python
from langserve.client import RemoteRunnable

runnable = RemoteRunnable("http://localhost:8000/shopping-assistant")
```