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
Pythonlanggraphchannelslast_valueLastValue
Class●Since v0.1

LastValue

Copy
LastValue(
    self,
    typ: Any,
    key: str = '',
)

Bases

Generic[Value]BaseChannel[Value, Value, Value]

Constructors

Attributes

Methods

Inherited fromBaseChannel

Attributes

Atyp: typAkey: str
—

Key for the cache entry.

Methods

MconsumeMfinish
View source on GitHub
constructor
__init__
NameType
typAny
keystr
attribute
value: Value | Any
attribute
ValueType: type[Value]

The type of the value stored in the channel.

attribute
UpdateType: type[Value]

The type of the update received by the channel.

method
copy

Return a copy of the channel.

method
from_checkpoint
method
update
method
get
method
is_available
method
checkpoint

Stores the last value received, can receive at most one value per step.