community

How to add a community integration (not recommended)

danger

We recommend following the main integration guide to add new integrations instead.

If you follow this guide, there is a high likelihood we will close your PR with the above guide linked without much discussion.

The langchain-community package is in libs/community.

It can be installed with pip install langchain-community, and exported members can be imported with code like

from langchain_community.chat_models import ChatParrotLink
from langchain_community.llms import ParrotLinkLLM
from langchain_community.vectorstores import ParrotLinkVectorStore

The community package relies on manually-installed dependent packages, so you will see errors if you try to import a package that is not installed. In our fake example, if you tried to import ParrotLinkLLM without installing parrot-link-sdk, you will see an ImportError telling you to install it when trying to use it.

Let's say we wanted to implement a chat model for Parrot Link AI. We would create a new file in libs/community/langchain_community/chat_models/parrot_link.py with the following code:

from langchain_core.language_models.chat_models import BaseChatModel

class ChatParrotLink(BaseChatModel):
    """ChatParrotLink chat model.

    Example:
        .. code-block:: python

            from langchain_community.chat_models import ChatParrotLink

            model = ChatParrotLink()
    """

    ...

API Reference:BaseChatModel

And we would write tests in:

• Unit tests: libs/community/tests/unit_tests/chat_models/test_parrot_link.py
• Integration tests: libs/community/tests/integration_tests/chat_models/test_parrot_link.py

And add documentation to:

• docs/docs/integrations/chat/parrot_link.ipynb