langchain/templates/pii-protected-chatbot/README.md

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# pii-protected-chatbot
This template creates a chatbot that flags any incoming PII and doesn't pass it to the LLM.
## Environment Setup
The following environment variables need to be set:
Set the `OPENAI_API_KEY` environment variable to access the OpenAI models.
## Usage
To use this package, you should first have the LangChain CLI installed:
```shell
pip install -U "langchain-cli[serve]"
```
To create a new LangChain project and install this as the only package, you can do:
```shell
langchain app new my-app --package pii-protected-chatbot
```
If you want to add this to an existing project, you can just run:
```shell
langchain app add pii-protected-chatbot
```
And add the following code to your `server.py` file:
```python
from pii_protected_chatbot.chain import chain as pii_protected_chatbot
add_routes(app, pii_protected_chatbot, path="/openai-functions-agent")
```
(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/pii_protected_chatbot/playground](http://127.0.0.1:8000/pii_protected_chatbot/playground)
We can access the template from code with:
```python
from langserve.client import RemoteRunnable
runnable = RemoteRunnable("http://localhost:8000/pii_protected_chatbot")
```