# Docs by LangChain: Open source (Python)

> Markdown index of the Open source (Python) documentation.

## Open source (Python)

- [Context overview](https://docs.langchain.com/oss/python/concepts/context.md)
- [Memory overview](https://docs.langchain.com/oss/python/concepts/memory.md)
- [Runtimes, frameworks, and harnesses](https://docs.langchain.com/oss/python/concepts/products.md)
- [Providers and models](https://docs.langchain.com/oss/python/concepts/providers-and-models.md)