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# extraction-anthropic-functions
This template enables [Anthropic function calling](https://python.langchain.com/docs/integrations/chat/anthropic_functions).
This can be used for various tasks, such as extraction or tagging.
The function output schema can be set in `chain.py`.
## Environment Setup
Set the `ANTHROPIC_API_KEY` environment variable to access the Anthropic models.
## 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 extraction-anthropic-functions
```
If you want to add this to an existing project, you can just run:
```shell
langchain app add extraction-anthropic-functions
```
And add the following code to your `server.py` file:
```python
from extraction_anthropic_functions import chain as extraction_anthropic_functions_chain
add_routes(app, extraction_anthropic_functions_chain, path="/extraction-anthropic-functions")
```
(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/extraction-anthropic-functions/playground](http://127.0.0.1:8000/extraction-anthropic-functions/playground)
We can access the template from code with:
```python
from langserve.client import RemoteRunnable
runnable = RemoteRunnable("http://localhost:8000/extraction-anthropic-functions")
```
By default, the package will extract the title and author of papers from the information you specify in `chain.py`. This template will use `Claude2` by default.
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