LangChain Reference home pageLangChain ReferenceLangChain Reference
  • GitHub
  • Main Docs
Deep Agents
LangChain
LangGraph
Integrations
LangSmith
  • Overview
  • Graphs
  • Functional API
  • Pregel
  • Checkpointing
  • Storage
  • Caching
  • Types
  • Runtime
  • Config
  • Errors
  • Constants
  • Channels
  • Agents
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

OverviewGraphsFunctional APIPregelCheckpointingStorageCachingTypesRuntimeConfigErrorsConstantsChannelsAgents
LangGraph CLI
LangGraph SDK
LangGraph Supervisor
LangGraph Swarm
Language
Theme
Pythonlanggraph_internal_fieldsget_field_default
Function●Since v0.6

get_field_default

Determine the default value for a field in a state schema.

Copy
get_field_default(
  name: str,
  type_: Any,
  schema: type[Any]
) -> Any

This is based on:

If TypedDict: - Required/NotRequired - total=False -> everything optional

  • Type annotation (Optional/Union[None])
View source on GitHub