langchain 1.2.10

Building applications with LLMs through composability

Stars: 126762, Watchers: 126762, Forks: 20858, Open Issues: 403

The langchain-ai/langchain repo was created 3 years ago and the last code push was 2 hours ago.
The project is extremely popular with a mindblowing 126762 github stars!

How to Install langchain

You can install langchain using pip

pip install langchain

or add it to a project with poetry

poetry add langchain

Package Details

Author

None

License

MIT

Homepage

None

PyPi:

https://pypi.org/project/langchain/

Documentation:

https://reference.langchain.com/python/langchain/langchain/

GitHub Repo:

https://github.com/hwchase17/langchain

Classifiers

• Scientific/Engineering/Artificial Intelligence
• Software Development/Libraries/Python Modules

Related Packages

Errors

A list of common langchain errors.

Code Examples

Here are some langchain code examples and snippets.

GitHub Issues

The langchain package has 403 open issues on GitHub

• fix(core): handle empty messages in ParrotFakeChatModel
• Feature: Screenpipe integration for screen/audio context in agents
• ParrotFakeChatModel._generate crashes with IndexError when messages list is empty
• pretty_repr(html=True) does not always return HTML-formatted output for non-string content
• Inconsistent/confusing astream returned AsyncIterator
• Support approximate token counting for image blocks in langchain-core
• fix(core): fix nested mustache variable extraction and update docs
• fix: reuse ToolStrategy in agent factory to prevent name mismatch
• not requiring uuid-utils for python-3.14 free-threading
• fix(core): add tool_call_id to on_tool_start and on_tool_end events
• feat(openai): add chatopenrouter to preserve model-specific parameters
• fix(core): google docstring parsing with no arguments/reserved arguments
• docs(core): clarify @tool decorator argument and return type requirements
• fix: preserve thinking blocks during active turns in SummarizationMiddleware
• docs: add example to create_message function docstring

See more issues on GitHub