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Title: types | langgraph | LangChain Reference

Open Graph Title: types | langgraph

X Title: types | langgraph

Description: Python API reference for types in langgraph. Part of the LangChain ecosystem.

Open Graph Description: Python API reference for types in langgraph. Part of the LangChain ecosystem.

X Description: Python API reference for types in langgraph. Part of the LangChain ecosystem.

Opengraph URL: https://reference.langchain.com/python/langgraph/types

direct link

Domain: reference.langchain.com

og:imagehttps://reference.langchain.com/og/python/langgraph/types
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og:image:height630
og:image:alttypes | langgraph
og:typearticle
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twitter:imagehttps://reference.langchain.com/og/python/langgraph/types

Links:

LangChain Reference home pagehttps://reference.langchain.com/
GitHubhttps://github.com/langchain-ai
Main Docshttps://docs.langchain.com/oss/python/langgraph
Deep Agentshttps://reference.langchain.com/python/deepagents
LangChainhttps://reference.langchain.com/python/langchain/overview
LangGraphhttps://reference.langchain.com/python/langgraph/overview
Integrationshttps://reference.langchain.com/python/integrations/overview
LangSmithhttps://reference.langchain.com/python/langsmith
Overviewhttps://reference.langchain.com/python/langgraph/overview
Overviewhttps://reference.langchain.com/python/langgraph
Graphshttps://reference.langchain.com/python/langgraph/graphs
Functional APIhttps://reference.langchain.com/python/langgraph/func
Pregelhttps://reference.langchain.com/python/langgraph/pregel
Checkpointinghttps://reference.langchain.com/python/langgraph/checkpoints
Storagehttps://reference.langchain.com/python/langgraph/store
Cachinghttps://reference.langchain.com/python/langgraph/cache
Typeshttps://reference.langchain.com/python/langgraph/types
Runtimehttps://reference.langchain.com/python/langgraph/runtime
Confighttps://reference.langchain.com/python/langgraph/config
Errorshttps://reference.langchain.com/python/langgraph/errors
Constantshttps://reference.langchain.com/python/langgraph/constants
Channelshttps://reference.langchain.com/python/langgraph/channels
Agentshttps://reference.langchain.com/python/langgraph/agents
LangGraph Checkpointhttps://reference.langchain.com/python/langgraph.checkpoint
LangGraph Storehttps://reference.langchain.com/python/langgraph.store
Checkpoint Postgreshttps://reference.langchain.com/python/langgraph.checkpoint.postgres
Store Postgreshttps://reference.langchain.com/python/langgraph.store.postgres
Checkpoint SQLitehttps://reference.langchain.com/python/langgraph.checkpoint.sqlite
LangGraph Prebuilthttps://reference.langchain.com/python/langgraph.prebuilt
LangGraph CLIhttps://reference.langchain.com/python/langgraph-cli
LangGraph SDKhttps://reference.langchain.com/python/langgraph-sdk
LangGraph Supervisorhttps://reference.langchain.com/python/langgraph-supervisor
LangGraph Swarmhttps://reference.langchain.com/python/langgraph-swarm
https://chat.langchain.com/
Overviewhttps://reference.langchain.com/python/langgraph
Graphshttps://reference.langchain.com/python/langgraph/graphs
Functional APIhttps://reference.langchain.com/python/langgraph/func
Pregelhttps://reference.langchain.com/python/langgraph/pregel
Checkpointinghttps://reference.langchain.com/python/langgraph/checkpoints
Storagehttps://reference.langchain.com/python/langgraph/store
Cachinghttps://reference.langchain.com/python/langgraph/cache
Typeshttps://reference.langchain.com/python/langgraph/types
Runtimehttps://reference.langchain.com/python/langgraph/runtime
Confighttps://reference.langchain.com/python/langgraph/config
Errorshttps://reference.langchain.com/python/langgraph/errors
Constantshttps://reference.langchain.com/python/langgraph/constants
Channelshttps://reference.langchain.com/python/langgraph/channels
Agentshttps://reference.langchain.com/python/langgraph/agents
LangGraph Checkpointhttps://reference.langchain.com/python/langgraph.checkpoint
LangGraph Storehttps://reference.langchain.com/python/langgraph.store
Checkpoint Postgreshttps://reference.langchain.com/python/langgraph.checkpoint.postgres
Store Postgreshttps://reference.langchain.com/python/langgraph.store.postgres
Checkpoint SQLitehttps://reference.langchain.com/python/langgraph.checkpoint.sqlite
LangGraph Prebuilthttps://reference.langchain.com/python/langgraph.prebuilt
LangGraph CLIhttps://reference.langchain.com/python/langgraph-cli
LangGraph SDKhttps://reference.langchain.com/python/langgraph-sdk
LangGraph Supervisorhttps://reference.langchain.com/python/langgraph-supervisor
LangGraph Swarmhttps://reference.langchain.com/python/langgraph-swarm
langgraphhttps://reference.langchain.com/python/langgraph
ClassRetryPolicyConfiguration for retrying nodes.https://reference.langchain.com/python/langgraph/types/RetryPolicy
ClassCachePolicyConfiguration for caching nodes.https://reference.langchain.com/python/langgraph/types/CachePolicy
ClassInterruptInformation about an interrupt that occurred in a node. Changed in version v0.4.0 interrupt_id was introduced as a property https://reference.langchain.com/python/langgraph/types/Interrupt
ClassPregelTaskA Pregel task.https://reference.langchain.com/python/langgraph/types/PregelTask
ClassStateSnapshotSnapshot of the state of the graph at the beginning of a step.https://reference.langchain.com/python/langgraph/types/StateSnapshot
ClassSendA message or packet to send to a specific node in the graph. The Send class is used within a StateGraph's conditional edges to dynamically invoke a node with a custom state at the next step. Imphttps://reference.langchain.com/python/langgraph/types/Send
ClassCommandOne or more commands to update the graph's state and send messages to nodes.https://reference.langchain.com/python/langgraph/types/Command
ClassOverwriteBypass a reducer and write the wrapped value directly to a BinaryOperatorAggregate channel. Receiving multiple Overwrite values for the same channel in a single super-step will raise an `InvalidUhttps://reference.langchain.com/python/langgraph/types/Overwrite
TypeCheckpointerType of the checkpointer to use for a subgraph. True enables persistent checkpointing for this subgraph. False disables checkpointing, even if the parent graph has a checkpointer. None in https://reference.langchain.com/python/langgraph/types/Checkpointer
AttributeAllSpecial value to indicate that graph should interrupt on all nodes.https://reference.langchain.com/python/langgraph/types/All
AttributeStreamModeHow the stream method should emit outputs. "values": Emit all values in the state after each step, including interrupts. When used with functional API, values are emitted once at the end of t https://reference.langchain.com/python/langgraph/types/StreamMode
AttributeStreamWriterCallable that accepts a single argument and writes it to the output stream. Always injected into nodes if requested as a keyword argument, but it's a no-op when not using stream_mode="custom".https://reference.langchain.com/python/langgraph/types/StreamWriter

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