LangChain Reference home page

GitHub
Main Docs

LangGraph Checkpoint

Checkpoint Postgres

Store Postgres

Checkpoint SQLite

LangGraph Prebuilt

LangGraph CLI

LangGraph SDK

LangGraph Supervisor

LangGraph Swarm

⌘I

LangChain Assistant

Ask a question to get started

Enter to send•Shift+Enter new line

Menu

LangGraph Checkpoint

Checkpoint Postgres

Checkpoint SQLite

LangGraph Prebuilt

LangGraph Supervisor

LangGraph Swarm

Language

Theme

Pythonlanggraph-sdkschemaCustomStreamPartdata

Attribute●Since v0.3

data

Copy

data: Any

View source on GitHub

User-defined data passed to StreamWriter inside a node.