https://github.com/hwchase17/langchain
https://python.langchain.com/en/latest/index.html
LangChain is a framework for developing applications powered by language models. We believe that the most powerful and differentiated applications will not only call out to a language model via an API, but will also:
Be data-aware: connect a language model to other sources of data
Be agentic: allow a language model to interact with its environment
The LangChain framework is designed with the above principles in mind.